Brother TD-2120N - Manual (Page 106)

ESC/P Command Reference
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5. Control Command Details
ESC iXQ1 Retrieve default character style
ASCII: ESC i X Q 1 n1 n2
Decimal: 27 105 88 81 49 n1 n2
Hexadecimal: 1B 69 58 51 31 n1 n2
Parameters
n1: 00h (Fixed)
n2: 00h (Fixed)
Description
 The default character style setting is returned as 3-byte data.
[1] 01h (Fixed)
[2] 00h (Fixed)
[3] Setting
00h: None (normal characters)
01h: Bold
02h: Outline
03h: Shadow
04h: Shadow and outline
 The retrieved value is a value specified by a static command.