diff --git a/src/modules/partition/partition.conf b/src/modules/partition/partition.conf
index 62b897e82..a5c428e23 100644
--- a/src/modules/partition/partition.conf
+++ b/src/modules/partition/partition.conf
@@ -26,10 +26,16 @@ drawNestedPartitions:   false
 # Show/hide partition labels on manual partitioning page.
 alwaysShowPartitionLabels: true
 
-# Default filesystem type, pre-selected in the "Create Partition" dialog
-# in the manual partitioning mode.
-# The filesystem type selected here is also used for automated install
-# modes (Erase, Replace and Alongside).
+# Default filesystem type, used when a "new" partition is made.
+#
+# When replacing a partition, the existing filesystem inside the
+# partition is retained. In other cases, e.g. Erase and Alongside,
+# as well as when using manual partitioning and creating a new
+# partition, this filesystem type is pre-selected. Note that
+# editing a partition in manual-creation mode will not automatically
+# change the filesystem type to this default value -- it is not
+# creating a new partition.
+#
 # Suggested values: ext2, ext3, ext4, reiser, xfs, jfs, btrfs
 # If nothing is specified, Calamares defaults to "ext4".
 defaultFileSystemType:  "ext4"