# Question about Sketching a Graph and Checking with Button

**URL:** <https://cl.desmos.com/t/question-about-sketching-a-graph-and-checking-with-button/1351>\
**Category:** Questions\
**Tags:** sketch\
**Created:** [August 22, 2020, 2:44am UTC](https://cl.desmos.com/t/question-about-sketching-a-graph-and-checking-with-button/1351 "2020-08-22T02:44:27Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Laura\_Osborne](https://yyz1.discourse-cdn.com/flex031/user_avatar/cl.desmos.com/laura_osborne/32/1019_2.png) [@Laura\_Osborne](https://cl.desmos.com/u/Laura_Osborne)\
**Post date:** [August 22, 2020, 2:44am UTC](https://cl.desmos.com/t/question-about-sketching-a-graph-and-checking-with-button/1351/1 "2020-08-22T02:44:27Z")

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Hi,  
I would like students to only be able to check their sketch using an action button after they have attempted a sketch. Is this possible?  
[Function Families](https://teacher.desmos.com/activitybuilder/custom/5f406b5934b48a2a5e52c1ae)  
Thanks for any help!

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<div class="post-metadata">

**Author:** ![cwinske](https://yyz1.discourse-cdn.com/flex031/user_avatar/cl.desmos.com/cwinske/32/3106_2.png) [@cwinske](https://cl.desmos.com/u/cwinske)\
**Post date:** [August 22, 2020, 8:58pm UTC](https://cl.desmos.com/t/question-about-sketching-a-graph-and-checking-with-button/1351/2 "2020-08-22T20:58:09Z")

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For the action button, something like this could work for your first slide:

```auto
disabled: when graph1.sketch.totalStrokeLength<5 true otherwise false

```

You can set the totalStrokeLength to something you prefer - it’s measured based on the number of units in the grid.

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<div class="post-metadata">

**Author:** ![Laura\_Osborne](https://yyz1.discourse-cdn.com/flex031/user_avatar/cl.desmos.com/laura_osborne/32/1019_2.png) [@Laura\_Osborne](https://cl.desmos.com/u/Laura_Osborne)\
**Post date:** [August 23, 2020, 1:04am UTC](https://cl.desmos.com/t/question-about-sketching-a-graph-and-checking-with-button/1351/3 "2020-08-23T01:04:26Z")

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Thank you! That was exactly what I was looking for.