Canon EOS Rebel SL3 DSLR Camera with 18-55mm Lens (Black) - Manual (Page 120)

120
Setting the Maximum ISO Speed for [AUTO]
For ISO Auto, you can set the maximum ISO speed limit within ISO 400 -
ISO 25600.
1
Select [
z
ISO speed settings].
z Under the [
z
] tab, select [
z
ISO
speed settings] , then press < 0 >.
2
Select [Max for Auto].
z Select [Max for Auto] , then press
< 0 >.
3
Select the ISO speed.
z Select the ISO speed, then press
< 0 >.