ESC V n
Turn 90°clockwise rotation mode on/off.
It only support n=0, 1, 48, 49
This command is valid only in standard mode.
In underline mode,underline can’t rotate 90 degrees clockwise.
In clockwise rotation 90 degrees mode,the direction of double-height and
double-width is opposite of the normal mode.
ESC { n
Turn upside-down printing mode on/off.
Turns upside-down printing mode on or off.
When the LSB of n is 0, upside-down printing mode is turned off.
When the LSB of n is 1, upside-down printing mode is turned on.
Only the lowest bit of n is valid.
This command is enabled only when processed at the beginning of a line in
standard mode.
When this command is input in page mode, the printer performs only internal
flag operations.
This command does not affect printing in page mode.
In upside-down printing mode, the printer rotates the line to be printed by
180° and then prints it.