Since ARRM 2.0.2.5, it is possible to use the CHDMAN compressor to create a CHD file from .cue / .iso / .gdi / .toc files, or to use the MCISO compressor to create a CSO file from .iso files

This option is available via the tabs

• Selected roms: All selected roms with extensions recognized by the compressors will be processed.

• Selected systems: All roms contained in the selected systems with extensions recognized by the compressors will be processed.

After clicking on one of these buttons, a menu will offer you to choose the desired compressor.