To facilitate the visualization of columns while creating our design, there is a Photoshop plugin named Guideguide.
The Guideguide plugin (http://guideguide.me/) is supported for some versions of Photoshop, which are: CS5, CS6, and CC. However, if you have Photoshop CS4, Version 2.03 of this plugin will work, but it will no longer be updated with new features. This is a tool that guides us in creating custom guidelines for our Photoshop documents.
After installing the Guideguide plugin and creating a blank file, when we are accessing it in Photoshop, it will open the window shown in the following screenshot; I suggest filling it with the initial values shown, if you are not too familiar with grids:
Then, clicking on the ...