# Tools in EteRNA

**URL:** https://forum.eternagame.org/t/tools-in-eterna/2013
**Category:** Guides and Tutorials
**Created:** [January 17, 2011, 1:22am UTC](https://forum.eternagame.org/t/tools-in-eterna/2013 "2011-01-17T01:22:00Z")
**Posts on this page:** 5
**Page:** 1

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### Author: ![mpb21](https://forum.eternagame.org/letter_avatar_proxy/v4/letter/m/c89c15/32.png) [@mpb21](https://forum.eternagame.org/u/mpb21)
#### Post date: [January 17, 2011, 1:22am UTC](https://forum.eternagame.org/t/tools-in-eterna/2013/1 "2011-01-17T01:22:00Z")

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Until a new tutorial can be made to explain, this will have to suffice to explain some of the tools in EteRNA that are not explained elsewhere.

Selecting nucleotides:  
Use number keys 1-4.  
‘1’ = A (yellow)  
‘2’ = U (blue)  
‘3’ = G (red)  
‘4’ = C (green)

‘5’ = Flip nucleotide pair

To paint a nucleotide, click on one. To paint multiple nucleotides, click and drag over multiple nucleotides.

Tagging a nucleotide:  
PC: Control-click on a nucleotide  
Mac: Command-click on a nucleotide

Undo: ‘Z’  
Redo: ‘Y’

Space: toggle between target and natural mode

‘R’ = reset level to all A’s

‘+’ = Zoom in  
‘-‘ = Zoom out

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### Author: ![mat747](https://forum.eternagame.org/letter_avatar_proxy/v4/letter/m/c57346/32.png) [@mat747](https://forum.eternagame.org/u/mat747)
#### Post date: [January 17, 2011, 3:44am UTC](https://forum.eternagame.org/t/tools-in-eterna/2013/2 "2011-01-17T03:44:00Z")

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Also see “Hot Keys documentation” posted by Spmm and added to by madde.

[http://getsatisfaction.com/eternagame…](http://getsatisfaction.com/eternagame/topics/hot_keys_documentation)

Posted a few weeks ago

Thank Matt for all the information and guides you have made.

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### Author: ![bentrem](https://forum.eternagame.org/letter_avatar_proxy/v4/letter/b/ea5d25/32.png) [@bentrem](https://forum.eternagame.org/u/bentrem)
#### Post date: [November 19, 2012, 3:30am UTC](https://forum.eternagame.org/t/tools-in-eterna/2013/4 "2012-11-19T03:30:00Z")

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Isn’t that just a dupe? Reason I ask: mini-docs like this can fork … good additions to one or another, not always in sync.

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### Author: ![LPC98](https://forum.eternagame.org/letter_avatar_proxy/v4/letter/l/3ec8ea/32.png) [@LPC98](https://forum.eternagame.org/u/LPC98)
#### Post date: [December 27, 2013, 3:24am UTC](https://forum.eternagame.org/t/tools-in-eterna/2013/5 "2013-12-27T03:24:00Z")

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Q, W, and E can be used to place base pairs (AU, GU, and GC, respectively). It’s pretty great.

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### Author: ![Eli\_Fisker](https://forum.eternagame.org/user_avatar/forum.eternagame.org/eli_fisker/32/4453_2.png) [@Eli\_Fisker](https://forum.eternagame.org/u/Eli_Fisker)
#### Post date: [December 27, 2013, 10:39am UTC](https://forum.eternagame.org/t/tools-in-eterna/2013/6 "2013-12-27T10:39:00Z")

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Also check out this more complete collection of shortcuts and tool setting explanations.

[EteRNA Toolbox](https://docs.google.com/document/d/1jTrH2bAj-WXbDlNjSU-ZixEpZgSW4mhHeniAX2JUcGg/edit?pli=1)