With Filestar you get 12 different skills for working productively with MGR Bitmap (.mgr) files.
About .Mgr
Name
MGR Bitmap
Extension
.mgr
Format
Binary
Category
Raster Image
Developer
Bell Labs
Description
The MGR bitmap file type is associated with the MGR windowing system, which is one of the early graphical user interfaces primarily used on Unix systems. These files contain bitmap images, which are digital images composed of pixels arranged in a grid. MGR bitmap files are used for storing and displaying simple graphics, icons, and interface components within the MGR environment. Despite its historical significance, the MGR windowing system and its bitmap file format are now considered obsolete and are rarely used in modern applications.