This tutorial will show you how to create an interactive to-do list in Google Sheets including automatic strikethroughs when you mark tasks complete with a checkmark.
As shown in the image above, the core functionality of this list will be driven by checkboxes. You can enter get them into your spreadsheet by going to the Insert menu and choosing Checkbox. Insert one and then copy and paste it down until you have as many as you want. Add your tasks in the column to the right of the checkboxes.
Now, if you're like me, when you're done with the task, you'd love to be able to check it off and get a little strikethrough, right? You can feel like you're accomplishing something. The strike through will come from using the conditional formatting feature.
After selecting Conditional formatting, a Conditional formatting rules box will appear on the right. Look closely at the picture below. For the range, we have specified
C5:C which will select everything in column C from row 5 and below, assuming that is where you have placed your list of tasks. Once you move out of this input field, you should see that everything in column C starting a row 5 and down to the end of where you have things typed is highlighted.
Right now, it's just applying formatting as Cell is not empty because that's the default choice. Change that by going to the drop down menu below Format cells if... and choosing Custom formula is. Now this box is waiting for a custom formula. Left-click into it to put the cursor in it. Whenever you're typing a formula, even if it's in here, you start it with an equals sign. Type the formula
=B5=TRUE. Make sure you don't use the period at the end. When a checkbox is checked, it changes the value of the cell from FALSE to TRUE. This formula will check for the TRUE state.
If the value is true, we will apply Custom Formatting style. Choose a style to make strike it through and make the background gray so it looks like it's going away.
If you want to add something else at the bottom, you won't have to redo this rule because that formatting contains the entire column after C5.
Completed Task List
Pretty easy to put together. Really satisfying to use. Have some fun with it, and let us know how it turns out.