The Native code for Thai: 0xD3/Unicode: 0xoE33 
cannot be used as superimposed characters.
You cannot use superimposed Thai characters.
When [ASCII] is selected for the [Standard Font] under [Display Language], select a text size from the three fixed sizes: [6×10 pixels], [8×13 pixels], or [13×23 pixels]. (You cannot select fixed sizes if using the GP-4100 series.)
When the [Character Size] is [6×10 pixels] fixed size, you cannot select [Bold] from the [Text Attribute].
When you display the text registered in a text table on a part with a [Fixed Size], refer to the ASCII text table and select or add the text for the part. Text on a table without ASCII language settings cannot be properly displayed on the GP.
If you change the font type to [Standard Font] after the text has been entered as a [Stroke Font], the text may not be displayed on the GP.
You cannot use the font area in the following models. The screen area is used when you use something other than fixed fonts.
GP-32** Series
GP-4100 Series
GP-4201TM, GP-4301TM
ST3000 Series
If using several types of fonts, the screen area is used for the font area excess. Therefore, the screen data capacity is decreased.
When Standard Font is selected, special characters specific to languages that are not supported by Standard Font cannot be displayed properly.
Also, when the fixed size (6×10, 8×13, 13×23) is selected, characters other than the single-byte characters cannot be displayed properly.
You can enter text in [Comments], etc. using Unicode while pressing the [Alt] key, but you may not be able to enter Thai characters for the following settings using this method.
When entering [Comments] while changing the keypad attributes
When entering [Comments] while creating a new Image Unit Window
When entering text for the [Display/CSV Save] Tab and the [Printing] tab in the sampling settings
When inputting a message for Alarm settings
When inputting [Comments] while changing the [ID] of a D-Script
When using Built-in Functions of D-Script
When entering text in [Find Comments] and [Search for Characters] in the Search Window
When entering rung comments in the logic screen
The Native code for Thai: 0xD3/Unicode: 0xoE33 cannot be used as superimposed characters.
You cannot use superimposed Thai characters.
Key Part
Data display [Text Display] and [Input Display]