Settings in the file doublecmd.ini

[Configuration] General settings
CaseSensitiveSort=0 0: Case sensitive sort OFF
1: Case sensitive sort ON
CopyBlockSize=64 Sets block size for copying (in kbytes=1024 bytes). Default is 64 (=65536 bytes).
CustomDriveIcons=0 Use custom drive icons (from %commander_path%\pixmaps\XxX\devices\) instead system icons (Windows only)
0: Use system icons
1: Use custom icons
LuaLib=path Path to lua lib (lua.so or luajit.so Linux) (lua.dll or luajit.dll Windows) - need for using script-plugins or for internal scripting
DirTabLimit=32 Maximum number of characters shown in a directory tab
DriveBlackList List of drives that don't show in drive bar/menu (; - separator)
UseExtEdit=0 0: Use internal editor
1: Use external editor (see ExtEdit)
UseExtView=0 0: Use internal viever
1: Use external viewer (see ExtView)
UseExtDiff=0 0: Use internal file differ
1: Use external file differ (see ExtDiff)
ExtEdit External editor for F4
ExtView External viewer for F3
ExtDiff External file differ
Font.Name=default    Font for the file panels
Font.Size=10 Font size for the file panels
Font.Style Font style for the file panels
Maximized=0    Window state
0: normal,
1: maximal size
MouseSelectionEnabled=1 Enable mouse selection
0: no
1: yes
QuickSearchMatchBeginning=1 0: A search string like "double" will be read as "*double"
1: Exact match: typing "cmd" will find only "cmd.ini", but not "doublecmd.ini"
QuickSearchMatchEnding=1 0: Typing a dot is read as *. , "double.i" finds also "doublecmd.ini"
1: Exact match: typing "double.i" finds only "double.ini", but doesn't find "doublecmd.ini"
ScrollMode=0 Mouse wheel scroll mode
0: Line by line with cursor movement
1: Line by line
2: Page by page
ShowIcons=1 Show icons in file panel
 0: no
 1: yes
ShowSystemFiles=0 Show system files
0: No
1: Yes
UseIniInProgramDir=0 Location of DC configuration files
0: Use configuration files from user home directory
1: Use configuration files from program directory