CTRL with the "+" in the laptop

[primo]

the question is; how to press CTRL with the "+" in the laptop so to increase the letters size

in many editors we can increase the fonts size by pressing CTRL and "+" and to decrease we press CTRL and "-"
this is in thinbasic editor and in notepad++ and others
but this is when i use the Desktop computer in which there is a big "+" and "-" on the rightmost of the keyboard
i got an old laptop hp pavilion ze000 from year 2006. i can't do the same with the laptop. i have asked someone have modern laptop and he said CTRL with "=" works to increase the fonts size. but it does not work for me.
any ideas. Thanks

[ReneMiner]

Do you have a mouse? Click the control/textbox then hold CTRL-Key and turn the mousewheel

[primo]

You are Genius ReneMiner that works very well Thank you. can't wait to tell the friend about this workaround solution

[ErosOlmi]

Will restore CTRL + and CTRL - keyboard accelerators in next thinBasic release