Here’s something else you’ll find extremely beneficial while shooting video: the EOS R allows users to customize just about every button and dial on the body to another function that can help you while shooting.
The EOS R actually includes more control options for button and dial customizations than we’ve seen with previous Canon DSLRs. Most can even be assigned one function for still shooting and another during movie recording — and when you switch between still and video, the saved button customizations automatically follow.
Customize all four pads on the cross-keys or the SET button; the Multi-function button, the Mode button, the SET button, the AF switch on the lens, AF point selection button (AF-ON), even the LCD panel illumination button are some that be assigned to assist you with different camera functions for quick access. The key is you can set up the camera controls to operate to your specifications.
Here’s something you may find most useful — assign ‘Switch to Custom Shooting Mode’ to the Multi-function button. This will cycle through the custom (C1, C2, C3) shooting modes. If you were to set slow motion settings to C1, and were shooting at 23,98fps, for instance, when you press the Multi-function button, then you could switch to record High Speed movies at 120fps with the press of a button.