How to increase font size of custom report? and spacing

how can i increase the font of report and give spacing after each line while using thermal printer t-81

ihave used > tag to give space but nothing happens

If you want a space after each line then use <J00> tags for each space you want. Font size can be controlled with the numbers after <J00> where 00 can become the font size. Example <J10> or <J15> they control width and height.

oh so fore also we can use tag thanks