Once a tag has been placed on a cell in a table, it is possible to manually change the properties of the tag by clicking on the tag, and then clicking on the Properties tab. Some properties on multiple cells can be edited simultaneously if you select more than one cell.
The status on a cell must be set to In Edit or Under Review if you wish to edit its properties. This is accomplished by right clicking on the cell in question and selecting one of the options below.
You can then edit the relevant property by clicking on the button that is indicated by the screenshot below.
The different properties on a cell are described on the page here.
Finally, you can get an overview of what properties are applied to cells if you right click on any cell that is tagged and select the the option Shown Values As.