The limit tolerance is marked with ED command: "ED"-select the mark to be modified-enter the upper limit tolerance of the tolerance after the original mark, then enter the tolerance, and click a/b to confirm. After modifying the dimension style, the size of the whole drawing will not change, but the font will become larger or smaller. To make the size smaller or larger, you can only draw the arrow symbol with the leader size and enter the size with multiple lines of text, which can be scaled.