White balance in viewfinder

[kanan11]

So my mother just switched from mirror to mirror less. She wants to take pictures in her studio so her white balance is set to flash. So when she’s looking through her viewfinder she sees orange. Is there a way to have a different white balance in your viewfinder?

[shadowsports]

Greetings,

Please provide the model(s) of her gear.  Camera, lens(es) and flash.  What shooting mode is she using? "M"?.. The more details you provide the easier it will be for us to try and help.   

[kvbarkley]

If the room light is not balanced the same as the flash, how the heck is the camera supposed to know that to correct it in the viewfinder? She would need some flash/daylight balanced modeling lights. The only other option is to change white balance between setup/flash which will only lead to mistakes.