Board Thread:Support Requests - Designing Your Wiki/@comment-33688175-20200317170752/@comment-9605025-20200518013734

Rather than using br, you should probably just use a second row. As for centering the text, you need to place "text-align: center" on the cells, not the rows. For example:
 * - style="font-size:95%;" valign="top"
 * style="text-align: center;" | Checkpoints
 * style="text-align: center;" |
 * style="text-align: center;" |