diff --git a/CHANGELOG.md b/CHANGELOG.md
index d0386a4f943..71be86913a7 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -23,11 +23,13 @@ Note that this project **does not** adhere to [Semantic Versioning](http://semve
 ### Changed
 
 - 'Get full text' now also checks the file url. [#568](https://github.com/koppor/jabref/issues/568)
-- JabRef writes a new backup file only if there is a change. Before, JabRef created a backup upon start. [#9679](https://github.com/JabRef/jabref/pull/9679)
+- We modified the `Add Group` dialog to use the most recently selected group hierarchical context. [#9141](https://github.com/JabRef/jabref/issues/9141)
 - We refined the 'main directory not found' error message. [#9625](https://github.com/JabRef/jabref/pull/9625)
-- We streamlined the paths for logs and backups: The parent path fragement is always `logs` or `backups`.
+- JabRef writes a new backup file only if there is a change. Before, JabRef created a backup upon start. [#9679](https://github.com/JabRef/jabref/pull/9679)
 - Backups of libraries are not stored per JabRef version, but collected together.
-- We modified the `Add Group` dialog to use the most recently selected group hierarchical context [#9141](https://github.com/JabRef/jabref/issues/9141)
+- We streamlined the paths for logs and backups: The parent path fragement is always `logs` or `backups`.
+- `log.txt` now contains debug messages. Debugging needs to be enabled explicitly. [#9678](https://github.com/JabRef/jabref/pull/9678)
+- `log.txt` does not contain entries for non-found files during PDF indexing. [#9678](https://github.com/JabRef/jabref/pull/9678)
 - We improved the Medline importer to correctly import ISO dates for `revised`. [#9536](https://github.com/JabRef/jabref/issues/9536)
 
 
diff --git a/docs/code-howtos/logging.md b/docs/code-howtos/logging.md
index 741600cd625..09b252b525e 100644
--- a/docs/code-howtos/logging.md
+++ b/docs/code-howtos/logging.md
@@ -5,20 +5,44 @@ parent: Code Howtos
 
 JabRef uses the logging facade [SLF4j](https://www.slf4j.org). All log messages are passed internally to [tinylog](https://tinylog.org/v2/) which handles any filtering, formatting and writing of log messages.
 
-* Obtaining a logger for a class:
+Obtaining a logger for a class:
 
-    ```java
-    private static final Logger LOGGER = LoggerFactory.getLogger(<ClassName>.class);
-    ```
+```java
+private static final Logger LOGGER = LoggerFactory.getLogger(<ClassName>.class);
+```
 
-* If the logging event is caused by an exception, please add the exception to the log message as:
+Please always use `LOGGER.debug` for debugging.
 
-    ```java
-      catch (SomeException e) {
-         LOGGER.warn("Warning text.", e);
-         ...
-      }
-    ```
+Example:
+
+```java
+String example = "example";
+LOGGER.debug("Some state {}", example);
+```
+
+Enable logging in `tinylog.properties`:
+
+```properties
+level@org.jabref.example.ExampleClass = debug
+```
+
+If the logging event is caused by an exception, please add the exception to the log message as:
+
+```java
+  catch (SomeException e) {
+     LOGGER.warn("Warning text.", e);
+     ...
+  }
+```
+
+When running tests, `tinylog-test.properties` is used.
+It is located under `src/test/resources`. As default, only `info` is logged.
+When developing, it makes sense to use `debug` as log level.
+One can change the log level per class using the pattern `level@class=debug` is set to `debug`.
+In the `.properties` file, this is done for `org.jabref.model.entry.BibEntry`.
+
+## Further reading
+
+SLF4J also support parameterized logging, e.g. if you want to print out multiple arguments in a log statement use a pair of curly braces (`{}`). 
+Head to <https://www.slf4j.org/faq.html#logging_performance> for examples.
 
-* SLF4J also support parameterized logging, e.g. if you want to print out multiple arguments in a log statement use a pair of curly braces. [Examples](https://www.slf4j.org/faq.html#logging\_performance)
-* When running tests, `tinylog-test.properties` is used. It is located under `src/test/resources`. As default, only `info` is logged. When developing, it makes sense to use `debug` as log level. One can change the log level per class using the pattern `level@class=debug` is set to `debug`. In the `.properties` file, this is done for `org.jabref.model.entry.BibEntry`.
diff --git a/src/main/java/org/jabref/cli/Launcher.java b/src/main/java/org/jabref/cli/Launcher.java
index a0a9f7450f8..bc9dd85d26e 100644
--- a/src/main/java/org/jabref/cli/Launcher.java
+++ b/src/main/java/org/jabref/cli/Launcher.java
@@ -108,7 +108,7 @@ private static void addLogToDisk() {
         // https://tinylog.org/v2/configuration/#shared-file-writer
         Map<String, String> configuration = Map.of(
                 "writerFile", "shared file",
-                "writerFile.level", "info",
+                "writerFile.level", "debug",
                 "writerFile.file", directory.resolve("log.txt").toString(),
                 "writerFile.charset", "UTF-8");
 
diff --git a/src/main/java/org/jabref/logic/pdf/search/indexing/PdfIndexer.java b/src/main/java/org/jabref/logic/pdf/search/indexing/PdfIndexer.java
index 975cf83b1ec..4fea4b638a5 100644
--- a/src/main/java/org/jabref/logic/pdf/search/indexing/PdfIndexer.java
+++ b/src/main/java/org/jabref/logic/pdf/search/indexing/PdfIndexer.java
@@ -188,7 +188,7 @@ private void writeToIndex(BibEntry entry, LinkedFile linkedFile) {
         }
         Optional<Path> resolvedPath = linkedFile.findIn(databaseContext, filePreferences);
         if (resolvedPath.isEmpty()) {
-            LOGGER.warn("Could not find {}", linkedFile.getLink());
+            LOGGER.debug("Could not find {}", linkedFile.getLink());
             return;
         }
         try {
diff --git a/src/main/java/org/jabref/model/database/BibDatabaseContext.java b/src/main/java/org/jabref/model/database/BibDatabaseContext.java
index 436f2b070c7..da736d6e974 100644
--- a/src/main/java/org/jabref/model/database/BibDatabaseContext.java
+++ b/src/main/java/org/jabref/model/database/BibDatabaseContext.java
@@ -248,13 +248,17 @@ public static Path getFulltextIndexBasePath() {
 
     public Path getFulltextIndexPath() {
         Path appData = getFulltextIndexBasePath();
+        Path indexPath;
 
         if (getDatabasePath().isPresent()) {
-            LOGGER.info("Index path for {} is {}", getDatabasePath().get(), appData);
-            return appData.resolve(String.valueOf(this.getDatabasePath().get().hashCode()));
+            indexPath = appData.resolve(String.valueOf(this.getDatabasePath().get().hashCode()));
+            LOGGER.debug("Index path for {} is {}", getDatabasePath().get(), indexPath);
+            return indexPath;
         }
 
-        return appData.resolve("unsaved");
+        indexPath = appData.resolve("unsaved");
+        LOGGER.debug("Using index for unsaved database: {}", indexPath);
+        return indexPath;
     }
 
     @Override
diff --git a/src/main/resources/tinylog.properties b/src/main/resources/tinylog.properties
index 26696d06933..b4340fa32e9 100644
--- a/src/main/resources/tinylog.properties
+++ b/src/main/resources/tinylog.properties
@@ -5,3 +5,5 @@ writerAzure = application insights
 
 # More shrunk exception logs. See https://tinylog.org/v2/configuration/#strip-stack-trace-elements for details
 exception = strip: jdk.internal
+
+#level@org.jabref.model.entry.BibEntry = debug