The row of letters at the top of each column are called headers, by clicking this letter you will highlight the entire column.
Step 2: Right click on the Column Header to Show the Dropdown Menu
By right clicking the header the dropdown menu will display.
Step 3: Select Hide Column to Hide your Selected Column(s)
From the menu select the Hide column option.
Once selected the menu will disappear and you will see your data with the chosen column now hidden from view. Note that although hidden from view, the information will still be referenced by any formulas implemented.
How to Hide Multiple Sequential Columns in Google Sheets
Step 1: Select Your Sequential Columns
Click one of the headers you want to conceal then drag the cursor over to the next one, highlighting them both.
Step 2: Right Click on a Highlighted Column Header to Display Column Options
Right click on either of the selected headers for the dropdown menu, this will display options for the highlighted ranges.
Step 3: Select Hide Columns
Select Hide columns C-D. In our example sheet below ‘B’ to ‘E’ now are the only ones showing with ‘C’ and ‘D’ hidden.
How to Hide Multiple Non-consecutive Columns in Google Sheets
Step 1: Select your First Column
Select the first column you want to highlight by clicking the header.
Step 2: Hold Command ⌘ + Click (Mac) or CTRL + Click (Windows) to Highlight Target Columns
Hold the ⌘ key down on a Mac or CTRL on Windows and select the header of the next column you want to highlight. In this case we have selected column ‘B’ and ‘D’
Step 3: Right Click on a Column Header to display the Column Menu
Right click on one of the selected headers only. The dropdown menu will appear.
Step 4: Hide your Selected Columns
Select Hide columns from the dropdown menu. The selections are now hidden