If it’s not the same, make it the same - you can always change it back later. The style should be the same for each cell where you want to make the change. This technique works in Word 2003 and later. In the steps below, I take you through how to add a period to the end of each selected cell in a table (substitute your own character(s) for the period if you want something different). Once Word’s got something to find, it can perform the replace action.
Word has to have something to find and as it can’t find a cell marker and as the text in each cell is different, there needs to be something it can hook on to - the style is what we get it to look for.
The critical thing that allows this to work is knowing the style used for the table cells. Did you know that you can add something (perhaps a missing period or a % symbol) just before each cell marker in a Word table? By default, there’s no easy way to find the cell markers using Word’s Find and Replace, but with a little trickery you can do it.