# CL to bring student sketch on graph to the next slide

**URL:** <https://cl.desmos.com/t/cl-to-bring-student-sketch-on-graph-to-the-next-slide/4197>\
**Category:** Questions\
**Tags:** sketch\
**Created:** [March 29, 2022, 5:49pm UTC](https://cl.desmos.com/t/cl-to-bring-student-sketch-on-graph-to-the-next-slide/4197 "2022-03-29T17:49:46Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![Jodi\_Donald](https://yyz1.discourse-cdn.com/flex031/user_avatar/cl.desmos.com/jodi_donald/32/3511_2.png) [@Jodi\_Donald](https://cl.desmos.com/u/Jodi_Donald)\
**Post date:** [March 29, 2022, 5:49pm UTC](https://cl.desmos.com/t/cl-to-bring-student-sketch-on-graph-to-the-next-slide/4197/1 "2022-03-29T17:49:47Z")

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I ask students to draw two points onto a graph that already has three points showing.

I need the original graph with their sketched points to follow them to the next screen.

I tried graphLayer with .calculatorState, but the student marks did not follow.

Help please!

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**Author:** ![pirsquared](https://avatars.discourse-cdn.com/v4/letter/p/4af34b/32.png) [@pirsquared](https://cl.desmos.com/u/pirsquared)\
**Post date:** [March 29, 2022, 6:05pm UTC](https://cl.desmos.com/t/cl-to-bring-student-sketch-on-graph-to-the-next-slide/4197/2 "2022-03-29T18:05:50Z")

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Have a look at this thread:

> [@Copy previous sketch by student to next slide](https://cl.desmos.com/t/copy-previous-sketch-by-student-to-next-slide/3203):
>
> Hi, I am trying to teach velocity vectors and acceleration vectors in calculus. I want to have a sketch with a path curve on the background. Students should draw the velocity vector on slide 1, then on slide 2 I want them to draw the acceleration vector on the same path at the same point. How can I get desmos to carry over the slide 1 drawing to slide 2? (I want them to see if the acceleration vector makes an obtuse or acute angle with the velocity vector) I understand that Copy Previous is …

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<div class="post-metadata">

**Author:** ![Jodi\_Donald](https://yyz1.discourse-cdn.com/flex031/user_avatar/cl.desmos.com/jodi_donald/32/3511_2.png) [@Jodi\_Donald](https://cl.desmos.com/u/Jodi_Donald)\
**Post date:** [March 29, 2022, 7:27pm UTC](https://cl.desmos.com/t/cl-to-bring-student-sketch-on-graph-to-the-next-slide/4197/3 "2022-03-29T19:27:21Z")

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> [@Jodi\_Donald](#):
>
> graphLayer

This did bring the sketch of the student, but I want to include the pre-made graph that they drew on as well.

So how do I combine the background: sketchLayer with a background:graphLayer?  
Or do is it more complicated than that?

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<div class="post-metadata">

**Author:** ![pirsquared](https://avatars.discourse-cdn.com/v4/letter/p/4af34b/32.png) [@pirsquared](https://cl.desmos.com/u/pirsquared)\
**Post date:** [March 29, 2022, 7:31pm UTC](https://cl.desmos.com/t/cl-to-bring-student-sketch-on-graph-to-the-next-slide/4197/4 "2022-03-29T19:31:53Z")

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You can use layerStack to combine layers:  
[https://teacher.desmos.com/computation-layer/documentation#function:layerStack](https://teacher.desmos.com/computation-layer/documentation#function:layerStack)

However, if the pre-made graph isn’t being edited by the students - just sketched over - then the simplest solution is just to recreate the same graph again on the next slide, and then add the background layer in CL.

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**Author:** ![Jodi\_Donald](https://yyz1.discourse-cdn.com/flex031/user_avatar/cl.desmos.com/jodi_donald/32/3511_2.png) [@Jodi\_Donald](https://cl.desmos.com/u/Jodi_Donald)\
**Post date:** [March 29, 2022, 7:53pm UTC](https://cl.desmos.com/t/cl-to-bring-student-sketch-on-graph-to-the-next-slide/4197/5 "2022-03-29T19:53:39Z")

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Of course. That is exactly what I will do. Woo Hoo!!!