Canon EOS 6D Mark II Instruction Manual page 92

Help
Help Display Text Size
You can select the text size for the Help display. By default, it is set to
[Small].
Example: [z3: High ISO speed NR]
Text size: Small
92
Select [Help text size].
1
Under the [53] tab, select [Help text
size], then press <0>.
Set the text size.
2
Select [Small] or [Standard], then
press <0>.
Text size: Standard