What is the best way to hint that a table cell is editable?

1. How do I make a cell editable in HTML table?
2. How do I edit cells in a table?

How do I make a cell editable in HTML table?

You can use the contenteditable attribute on the cells, rows, or table in question. Just note that if you make the table editable, in Mozilla at least, you can delete rows, etc. You'd also need to check whether your target audience's browsers supported this attribute.

How do I edit cells in a table?

Select the cells you want to change. Right-click the table, and then click Format Table. In the Format Table dialog box, click the Cell Properties tab. Under Text Box Margins, enter the margins you want.