File created by LabVIEW, a scientific measurement program used to interact with hardware devices; contains a menu that includes application items and custom user items; used to display virtual instrument (.VI) functions and operations.
RTM files must be referenced by a virtual instrument (VI) in order for the run-time menu to function correctly. Custom menus only appear while the VI is running.
RTM files may be created using LabVIEW by selecting Edit → Run-Time Menu within the Menu Editor.