diff --git a/.classpath b/.classpath
index f3bdce0..607b789 100644
--- a/.classpath
+++ b/.classpath
@@ -12,6 +12,13 @@
 			<attribute name="gradle_used_by_scope" value="main,test"/>
 		</attributes>
 	</classpathentry>
+	<classpathentry kind="src" output="bin/test" path="src/test/java">
+		<attributes>
+			<attribute name="gradle_scope" value="test"/>
+			<attribute name="gradle_used_by_scope" value="test"/>
+			<attribute name="test" value="true"/>
+		</attributes>
+	</classpathentry>
 	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-17/"/>
 	<classpathentry kind="con" path="org.eclipse.jst.j2ee.internal.web.container"/>
 	<classpathentry kind="con" path="org.eclipse.buildship.core.gradleclasspathcontainer">
diff --git a/.settings/org.eclipse.wst.common.component b/.settings/org.eclipse.wst.common.component
index 9c1b977..165c5ca 100644
--- a/.settings/org.eclipse.wst.common.component
+++ b/.settings/org.eclipse.wst.common.component
@@ -1,8 +1,14 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<project-modules id="moduleCoreId" project-version="1.5.0">
-	<wb-module deploy-name="BiCO">
-		<property name="context-root" value="BiCO"/>
-		<wb-resource deploy-path="/WEB-INF/classes" source-path="src/main/resources"/>
-		<wb-resource deploy-path="/WEB-INF/classes" source-path="src/main/java"/>
-	</wb-module>
+<?xml version="1.0" encoding="UTF-8"?><project-modules id="moduleCoreId" project-version="1.5.0">
+    	
+    <wb-module deploy-name="BiCO">
+        		
+        <property name="context-root" value="BiCO"/>
+        		
+        <wb-resource deploy-path="/WEB-INF/classes" source-path="src/main/resources"/>
+        		
+        <wb-resource deploy-path="/WEB-INF/classes" source-path="src/main/java"/>
+        <wb-resource deploy-path="/WEB-INF/classes" source-path="/src/test/java"/>
+        	
+    </wb-module>
+    
 </project-modules>
diff --git a/build.gradle b/build.gradle
index 36bdd43..78c809e 100644
--- a/build.gradle
+++ b/build.gradle
@@ -8,7 +8,7 @@ plugins {
 }
 
 group = 'de.jottyfan.bico'
-version = '0.1.4'
+version = '0.1.5'
 
 description = """BibleClassOrganizer"""
 
@@ -83,3 +83,8 @@ test {
 springBoot {
   buildInfo()
 }
+
+tasks.withType(JavaCompile).configureEach {
+    options.compilerArgs.add("-parameters")
+}
+
diff --git a/src/main/java/de/jottyfan/bico/modules/CommonController.java b/src/main/java/de/jottyfan/bico/modules/CommonController.java
index 32ac948..4d65350 100644
--- a/src/main/java/de/jottyfan/bico/modules/CommonController.java
+++ b/src/main/java/de/jottyfan/bico/modules/CommonController.java
@@ -42,7 +42,7 @@ public abstract class CommonController {
 			return false;
 		}
 	}
-	
+
 	@ModelAttribute("hasDateRole")
 	public Boolean hasDateRole(Principal principal) {
 		OAuth2AuthenticationToken token = (OAuth2AuthenticationToken) principal;
@@ -56,6 +56,21 @@ public abstract class CommonController {
 			return false;
 		}
 	}
+
+	@ModelAttribute("hasAnyRole")
+	public Boolean hasAnyRole(Principal principal) {
+		OAuth2AuthenticationToken token = (OAuth2AuthenticationToken) principal;
+		if (token != null) {
+			OAuth2User user = token.getPrincipal();
+			@SuppressWarnings("unchecked")
+			List<String> roles = (List<String>) user.getAttributes().get("roles");
+			return roles.size() > 0;
+		} else {
+			LOGGER.warn("token is null, no roles can be detected");
+			return false;
+		}
+	}
+
 	/**
 	 * get the theme for the current session
 	 *
diff --git a/src/main/java/de/jottyfan/bico/modules/lesson/LessonRepository.java b/src/main/java/de/jottyfan/bico/modules/lesson/LessonRepository.java
index ac40296..1e900ff 100644
--- a/src/main/java/de/jottyfan/bico/modules/lesson/LessonRepository.java
+++ b/src/main/java/de/jottyfan/bico/modules/lesson/LessonRepository.java
@@ -23,10 +23,10 @@ import de.jottyfan.bico.db.tables.records.TLessonRecord;
 import de.jottyfan.bico.db.tables.records.TPersonRecord;
 
 /**
-*
-* @author jotty
-*
-*/
+ *
+ * @author jotty
+ *
+ */
 @Repository
 public class LessonRepository {
 	private final static Logger LOGGER = LogManager.getLogger(LessonRepository.class);
diff --git a/src/main/java/de/jottyfan/bico/modules/profile/ProfileController.java b/src/main/java/de/jottyfan/bico/modules/profile/ProfileController.java
index 6c78592..1319521 100644
--- a/src/main/java/de/jottyfan/bico/modules/profile/ProfileController.java
+++ b/src/main/java/de/jottyfan/bico/modules/profile/ProfileController.java
@@ -25,7 +25,7 @@ public class ProfileController extends CommonController {
 	 * @param theme the theme
 	 */
 	@PostMapping("/updateTheme/{theme}")
-	public ResponseEntity<?> updateTheme(@PathVariable String theme) {
+	public ResponseEntity<?> updateTheme(@PathVariable("theme") String theme) {
 		// TODO: add profile's user name
 		String username = "jotty";
 		service.updateTheme(username, theme);
diff --git a/src/main/java/de/jottyfan/bico/modules/slot/SlotController.java b/src/main/java/de/jottyfan/bico/modules/slot/SlotController.java
index 3f27594..c5f6bda 100644
--- a/src/main/java/de/jottyfan/bico/modules/slot/SlotController.java
+++ b/src/main/java/de/jottyfan/bico/modules/slot/SlotController.java
@@ -30,20 +30,20 @@ public class SlotController extends CommonController {
 	}
 
 	@GetMapping("/slot/{id}")
-	public String load(@PathVariable Integer id, Model model) {
+	public String load(@PathVariable("id") Integer id, Model model) {
 		model.addAttribute("bean", id == null ? new SlotBean() : service.loadSlot(id));
 		model.addAttribute("hasLesson", service.slotHasLesson(id));
 		return "/slot/item";
 	}
 
 	@GetMapping("/slot/{id}/delete")
-	public String loadEnsurance(@PathVariable Integer id, Model model) {
+	public String loadEnsurance(@PathVariable("id") Integer id, Model model) {
 		model.addAttribute("bean", service.loadDeletableSlot(id));
 		return "/slot/delete";
 	}
 
 	@GetMapping("/slot/{id}/destroy")
-	public String destroy(@PathVariable Integer id, Model model) {
+	public String destroy(@PathVariable("id") Integer id, Model model) {
 		service.removeSlot(id);
 		return "redirect:/";
 	}
diff --git a/src/main/java/de/jottyfan/bico/modules/slot/SlotRepository.java b/src/main/java/de/jottyfan/bico/modules/slot/SlotRepository.java
index d728da3..0daf638 100644
--- a/src/main/java/de/jottyfan/bico/modules/slot/SlotRepository.java
+++ b/src/main/java/de/jottyfan/bico/modules/slot/SlotRepository.java
@@ -139,7 +139,7 @@ public class SlotRepository {
 			.selectFrom(T_LESSON)
 			.where(T_LESSON.FK_SLOT.eq(slotId));
 		// @formatter:on
-		LOGGER.trace(sql);
+		LOGGER.info(sql);
 		return sql.fetch().size() > 0;
 	}
 }
diff --git a/src/main/resources/application.properties b/src/main/resources/application.properties
index 3f48596..7801ebd 100644
--- a/src/main/resources/application.properties
+++ b/src/main/resources/application.properties
@@ -15,3 +15,4 @@ spring.security.oauth2.client.registration.nextcloud.client-id = ${nextcloud.cli
 spring.security.oauth2.client.registration.nextcloud.client-secret = ${nextcloud.client-secret}
 spring.security.oauth2.client.registration.nextcloud.authorization-grant-type = authorization_code
 spring.security.oauth2.client.registration.nextcloud.redirect-uri = ${nextcloud.redirect-uri}
+spring.security.oauth2.client.registration.nextcloud.client-authentication-method = client_secret_post
diff --git a/src/main/resources/templates/lesson/item.html b/src/main/resources/templates/lesson/item.html
index d78c4c5..345b74a 100644
--- a/src/main/resources/templates/lesson/item.html
+++ b/src/main/resources/templates/lesson/item.html
@@ -30,7 +30,8 @@
 						<div class="col-sm-9">
 							<button type="submit" class="btn btn-outline-success">Speichern</button>&nbsp;
 							<a th:href="@{/}" class="btn btn-outline-secondary">Abbrechen</a>&nbsp;
-							<a th:href="@{/lesson/{id}/remove(id=${bean.pkLesson})}" class="btn btn-outline-danger">Löschen</a>
+							<a th:href="@{/lesson/{id}/remove(id=${bean.pkLesson})}" class="btn btn-outline-danger">Zuordnung löschen</a>
+							<a th:href="@{/slot/{id}(id=${bean.fkSlot})}" class="btn btn-outline-warning">Termin bearbeiten</a>
 						</div>
 					</div>
 				</form>
diff --git a/src/main/resources/templates/sheet.html b/src/main/resources/templates/sheet.html
index 7eaaa2d..9b72417 100644
--- a/src/main/resources/templates/sheet.html
+++ b/src/main/resources/templates/sheet.html
@@ -14,7 +14,7 @@
 				</thead>
 				<tbody>
 					<tr th:each="s : ${list}">
-						<td th:data-sort="${#temporals.format(s.slotDay, 'yyyy-MM-dd')}"><span th:text="${#temporals.format(s.slotDay, 'dd.MM.yyyy')}"></span></td>
+						<td th:data-sort="${#temporals.format(s.slotDay, 'yyyy-MM-dd')}"><a th:href="@{/slot/{id}(id=${s.pkSlot})}" th:text="${#temporals.format(s.slotDay, 'dd.MM.yyyy')}"></a></td>
 						<td><a th:href="@{/lesson?slotId={id}(id=${s.pkSlot})}" class="btn btn-outline-secondary"> <span th:text="${s.abbreviation}" th:if="${s.abbreviation}"></span> <i
 								class="bi bi-pencil" th:if="${s.abbreviation == null || s.abbreviation.isBlank()}"></i>
 						</a></td>
@@ -32,8 +32,7 @@
 						  	</div>
 						  </div>
 						</td>
-						<td><a th:href="@{/slot/{id}(id=${s.pkSlot})}" class="btn btn-outline-secondary rightaligned"><i class="bi bi-pencil"></i></a>
-						    <span th:text="${s.slotNotes}" class="rightpadding64"></span></td>
+						<td><span th:text="${s.slotNotes}" class="rightpadding64"></span></td>
 					</tr>
 				</tbody>
 				<tfoot>
diff --git a/src/main/resources/templates/template.html b/src/main/resources/templates/template.html
index 95a5ec6..3ca7cfb 100644
--- a/src/main/resources/templates/template.html
+++ b/src/main/resources/templates/template.html
@@ -24,7 +24,7 @@
 			<span class="navbar-toggler-icon"></span>
 		</button>
 		<div class="collapse navbar-collapse" id="navbarSupportedContent" style="margin-right: 20px">
-			<ul class="navbar-nav mb-2 mb-lg-0" th:if="${hasBUrole || hasDateRole}">
+			<ul class="navbar-nav mb-2 mb-lg-0" th:if="${hasAnyRole}">
 				<li class="nav-item"><a class="btn btn-outline-secondary" th:href="@{/next}" style="margin-left: 12px">Dienstplan</a></li>
 				<li class="nav-item"><a class="btn btn-outline-secondary" th:href="@{/sheet}" style="margin-left: 12px" th:if="${hasBUrole}">Einteilung</a></li>
 				<li class="nav-item"><a class="btn btn-outline-secondary" th:href="@{/subject/list}" style="margin-left: 12px" th:if="${hasBUrole}">Themen</a></li>
@@ -47,8 +47,8 @@
 			</ul>
 		</div>
 	</nav>
-	<div layout:fragment="content" th:if="${hasBUrole || hasDateRole}">content</div>
-	<div th:unless="${hasBUrole || hasDateRole}">
+	<div layout:fragment="content" th:if="${hasAnyRole}">content</div>
+	<div th:unless="${hasAnyRole}">
 		<div class="borderdist">
 			<div class="alert alert-danger">Leider fehlen Ihnen die Berechtigungen, um diese Anwendung nutzen zu können.</div>
 		</div>