What are the most technical challenge for MR?​

How is the brightness of oled of the diaplay is controled

What are two ways to access the options for scaling and page orientation? click the home tab, then click alignment, or click the file tab. click the file tab, then click print, or click the page layout tab. click the page layout tab, or click the review tab. click the review tab, or click the home tab?

Me and category do i put them in because this is science