For example at 8 rows it may look like this
but 9 rows produces much smoother text:
The number of columns that can be displayed is dependant on the number of rows. More rows mean smaller rows and hence more characters.
Note that reducing the number of rows may reduce the number of columns such that text that you have entered may get truncated.
When connected to a remote machine, the number of columns that can be displayed on the remote machine govern the number of columns on both machines. This is done so that the controlling machine display reflects what the remote sign is displaying.
If you are creating a sequence of signs with differing text, it is best to maintain the same number of rows in each file. That way the rows that need to change will update as the next file is automatically loaded.
Note if you are using the Windows version to drive a RemoteSign ESP, it will likely have a lower maximum number of rows. Attempting to define more rows than the remote device can handle will result in error messages from the remote device.
See also: Screen aspect ratios