# onMouseMove question

**URL:** https://forum.kirupa.com/t/onmousemove-question/270133
**Category:** flash
**Created:** [September 5, 2008, 1:24pm UTC](https://forum.kirupa.com/t/onmousemove-question/270133 "2008-09-05T13:24:56Z")
**Posts on this page:** 1
**Page:** 1

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### Author: ![Mark\_1](https://avatars.discourse-cdn.com/v4/letter/m/c6cbf5/32.png) [@Mark\_1](https://forum.kirupa.com/u/Mark_1)
#### Post date: [September 5, 2008, 1:24pm UTC](https://forum.kirupa.com/t/onmousemove-question/270133/1 "2008-09-05T13:24:56Z")

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In the tutorial for “Interactive Image Panning” ([http://www.kirupa.com/developer/flash8/interactive\_image\_pan.htm](http://www.kirupa.com/developer/flash8/interactive_image_pan.htm)), the onMouseMove event, what is the purpose of the 4 and 1 in the code: constrainedMove(bg\_mc, 4, 1);  
What do these numbers represent or control?