Как добавить сетку на холст в aseprite?

I went to Edit > Preferences, then selected Grid in the left hand column. In the grid section there is a drop down menu at the very top. Select the option Grid for New Documents. There is a tick box next to Visible Pixel Grid - make sure it is set to true and the grid opacity is greater than zero.

In case there's a bug with updating the settings or if you want to double check, go to Edit > Preferences, then under General click the Locate Configuration File. Open the aseprite.ini file in a text editor. What I found in my config looked like this:

[pixel_grid]
color = gray{60,255}
opacity = 160
auto_opacity = true

and a little further down:

[show]
grid = false
pixel_grid = true