Indeed on my fr-bépo keyboard layout Ctrl+= has the same effect as Ctrl++ (zooming in incrementally) both in firefox and chromium, despite the fact that "=" and "+" are two separate keys. Ctrl+_ doesn’t do anything, but that’s probably because with this layout "_" is obtained with AltGr+Space.
In chromium’s source code (src/chrome/browser/ui/views/accelerator_table.cc), the following two keyboard shortcuts are assigned to the "zooming in" action:
Indeed on my fr-bépo keyboard layout Ctrl+= has the same effect as Ctrl++ (zooming in incrementally) both in firefox and chromium, despite the fact that "=" and "+" are two separate keys. Ctrl+_ doesn’t do anything, but that’s probably because with this layout "_" is obtained with AltGr+Space.
In chromium’s source code (src/chrome/ browser/ ui/views/ accelerator_ table.cc) , the following two keyboard shortcuts are assigned to the "zooming in" action:
{ ui::VKEY_OEM_PLUS, ui::EF_ CONTROL_ DOWN, IDC_ZOOM_PLUS }, CONTROL_ DOWN, IDC_ZOOM_PLUS },
{ ui::VKEY_ADD, ui::EF_
and several other places in the code suggest that VKEY_OEM_PLUS is "=".
Similarly, VKEY_OEM_MINUS is "_".