Modes
VideoRemap lets you choose if you want to render all the elements in a screen, or individual slices.
Screen
You will be able to choose a screen that the input will be mapped to. This mode will apply all elements (slices, masks etc) of that screen in the order that was configured in Resolume.
Individual Slices
Lets you select a screen and the individual slice in that screen that the clip will be mapped to.
info
Not all slices will be available to choose from. For example you will not be able to choose output masks in this mode.