Note -1.0 scaling value and its meaning

diff --git a/notes-thunderbird.md b/notes-thunderbird.md
index ca67872..7c533b1 100644 (file)
--- a/notes-thunderbird.md
+++ b/notes-thunderbird.md
@@ -24,7 +24,8 @@ In config editor, find property:
 
     layout.css.devPixelsPerPx
 
-then change its value from 2.0 to 1.0.
+then change its value from 2.0 to 1.0,
+or to -1.0 (which means match current X11 settings).
 
 #### Source