No need to select, just press Tab key to
comment multiple lines, select ctrl+alt+/
Enter (tr>td{$}*3)*4, and then press tab to get a table with 3 rows and 4 columns.
No need to select, just press Tab key to
comment multiple lines, select ctrl+alt+/
Enter (tr>td{$}*3)*4, and then press tab to get a table with 3 rows and 4 columns.