Yes, you can create collapsible sections in Excel using the Group and Outline feature. Here's how to do it:

1. Select the rows or columns that you want to group together.
2. Right-click on the selection and choose "Group" from the context menu.
3. A small button with a minus sign will appear to the left of the grouped rows or columns. Clicking on this button will collapse the group and hide the rows or columns within it.
4. To expand the group and show the hidden rows or columns, click on the plus sign that appears in place of the minus sign.

You can also use the keyboard shortcut to group selected rows or columns, and to ungroup them.

Additionally, you can customize the level of detail that is displayed when you collapse a group by using the "Outline" feature. Here's how:

1. Click on the "Data" tab in the ribbon.
2. Click on the "Group" button in the "Outline" section.
3. In the "Settings" dialog box, choose the level of detail that you want to display when you collapse a group. For example, you can choose to display only the summary rows or columns, or you can choose to display the detail rows or columns up to a certain level.
4. Click "OK" to apply the settings.

I hope this helps! Let me know if you have any other questions.