# OnTagsDropped - Auto Axis to display Eng Unit Label

**URL:** <https://forum.inductiveautomation.com/t/ontagsdropped-auto-axis-to-display-eng-unit-label/19906>\
**Category:** Ignition\
**Tags:** ignition79, scripting\
**Created:** [October 1, 2018, 11:16am UTC](https://forum.inductiveautomation.com/t/ontagsdropped-auto-axis-to-display-eng-unit-label/19906 "2018-10-01T11:16:21Z")\
**Posts on this page:** 1\
**Showing post:** 2

<div class="post-metadata">

**Author:** ![paul-griffith](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/paul-griffith/32/37249_2.png) [@paul-griffith](https://forum.inductiveautomation.com/u/paul-griffith)\
**Post date:** [October 1, 2018, 3:12pm UTC](https://forum.inductiveautomation.com/t/ontagsdropped-auto-axis-to-display-eng-unit-label/19906/2 "2018-10-01T15:12:17Z")

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```auto
	#Set up the chart defaults. 
	default = ['DefaultName', # name
	'[~]DefaultPath', # tag_path
	'MinMax', # aggregation_mode
	'Default Axis', # axis
	1, # subplot
	True, # enabled
	"color(255,0,0,255)", # color
	'', # dash_pattern
	1, # render_style
	1.0, # line_weight
	0, # shape
	True, # fill_shape
	False, # labels
	'', # group_name
	False, # digital
	False, # override_autocolor
	False, # hidden
	True, # user_selectable
	None, # sort_order
	False] # user_removable
	
	tagpens = self.tagPens
	for path in paths:
		newrow = default
		newrow[0] = path.split('/')[-1]
		newrow[3] = system.tag.read("%s.EngUnit" % path).value
		newrow[6] = self.autoColorList[tagpens.rowCount % len(self.autoColorList)]
		tagpens = system.dataset.addRow(tagpens, tagpens.rowCount, newrow)
		
	self.tagPens = tagpens

```

Absolutely possible; here’s a rudimentary implementation of onTagsDropped that will do it. The “important” line is: `newrow[3] = system.tag.read("%s.EngUnit" % path).value`

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_[View the full topic](https://forum.inductiveautomation.com/t/ontagsdropped-auto-axis-to-display-eng-unit-label/19906)._