diff --git a/doc/classes/ProjectSettings.xml b/doc/classes/ProjectSettings.xml
index 836c776ecb..248975adf5 100644
--- a/doc/classes/ProjectSettings.xml
+++ b/doc/classes/ProjectSettings.xml
@@ -263,19 +263,19 @@
 			Setting to hardcode audio delay when playing video. Best to leave this untouched unless you know what you are doing.
 		</member>
 		<member name="compression/formats/gzip/compression_level" type="int" setter="" getter="" default="-1">
-			Default compression level for gzip. Affects compressed scenes and resources.
+			The default compression level for gzip. Affects compressed scenes and resources. Higher levels result in smaller files at the cost of compression speed. Decompression speed is mostly unaffected by the compression level. [code]-1[/code] uses the default gzip compression level, which is identical to [code]6[/code] but could change in the future due to underlying zlib updates.
 		</member>
 		<member name="compression/formats/zlib/compression_level" type="int" setter="" getter="" default="-1">
-			Default compression level for Zlib. Affects compressed scenes and resources.
+			The default compression level for Zlib. Affects compressed scenes and resources. Higher levels result in smaller files at the cost of compression speed. Decompression speed is mostly unaffected by the compression level. [code]-1[/code] uses the default gzip compression level, which is identical to [code]6[/code] but could change in the future due to underlying zlib updates.
 		</member>
 		<member name="compression/formats/zstd/compression_level" type="int" setter="" getter="" default="3">
-			Default compression level for Zstandard. Affects compressed scenes and resources.
+			The default compression level for Zstandard. Affects compressed scenes and resources. Higher levels result in smaller files at the cost of compression speed. Decompression speed is mostly unaffected by the compression level.
 		</member>
 		<member name="compression/formats/zstd/long_distance_matching" type="bool" setter="" getter="" default="false">
-			Enables long-distance matching in Zstandard.
+			Enables [url=https://github.com/facebook/zstd/releases/tag/v1.3.2]long-distance matching[/url] in Zstandard.
 		</member>
 		<member name="compression/formats/zstd/window_log_size" type="int" setter="" getter="" default="27">
-			Largest size limit (in power of 2) allowed when compressing using long-distance matching with Zstandard.
+			Largest size limit (in power of 2) allowed when compressing using long-distance matching with Zstandard. Higher values can result in better compression, but will require more memory when compressing and decompressing.
 		</member>
 		<member name="debug/gdscript/completion/autocomplete_setters_and_getters" type="bool" setter="" getter="" default="false">
 			If [code]true[/code], displays getters and setters in autocompletion results in the script editor. This setting is meant to be used when porting old projects (Godot 2), as using member variables is the preferred style from Godot 3 onwards.