PDF417 CompactionMode

Either set height property in codebehind .cs file

BCSBarcodeCtrl1.PDF417CompactionMode = 0;

Or add a tag directly

< img src="barcodesoft.ashx?s=pdf417&pcm=2

< img src="barcodesoft.ashx?s=pdf417&pcm=3

int PDF417CompactionMode

Default value of PDF417CompactionMode property is 0 (Mixed Mode).
You can set it to a value between 1 and 3.
Other value will be reset to its default value 0.

Value Mode
0 Mixed Mode
1 Text Mode
2 Number Mode
3 Binary Mode

You can also setup PDF417CompactionMode property through URL by setting "pcm":
<img src="Barcodesoft.ashx?s=pdf417&TEXT=1234&pcm=2>