Hi there!

It sounds like you want to be able to click on a cell and have an "X" or check mark appear in the cell. This is definitely possible in Excel!

Here's how you can do it:

1. Select the cell where you want the "X" or check mark to appear.
2. Go to the "Insert" tab in the ribbon at the top of the screen.
3. Click on the "Symbol" button in the "Symbols" section.
4. In the "Symbol" dialog box, select "Wingdings" as the font.
5. Scroll down until you see the check mark symbol (it looks like a tick mark) or the letter "X" in a box.
6. Click on the symbol you want to use and then click the "Insert" button.
7. Close the "Symbol" dialog box.

Now, whenever you click on that cell, the "X" or check mark symbol will appear in the cell.

As for your second question about being able to see the headings at the bottom of the page, there are a few things you can try:

1. Freeze the top two rows of your spreadsheet so that they stay visible as you scroll down. To do this, select row 3 (or the row just below your headings) and then go to the "View" tab in the ribbon. Click on the "Freeze Panes" button in the "Window" section and select "Freeze Panes" from the drop-down menu.
2. Adjust the zoom level of your spreadsheet so that it fits on one screen. You can do this by clicking on the percentage value in the bottom right corner of the Excel window and selecting a lower percentage (like 75% or 50%) until everything fits on the screen.
3. Use the "Page Layout" view instead of the "Normal" view. This will show you how your spreadsheet will look when printed and may make it easier to see everything on one screen. To switch to "Page Layout" view, go to the "View" tab in the ribbon and click on the "Page Layout" button in the "Workbook Views" section.