# Help with Desk Organizer tutorial, can't get lines to stick

**URL:** <https://discourse.shapr3d.com/t/help-with-desk-organizer-tutorial-cant-get-lines-to-stick/41357>\
**Category:** Modeling Questions\
**Created:** [August 1, 2026, 9:44pm UTC](https://discourse.shapr3d.com/t/help-with-desk-organizer-tutorial-cant-get-lines-to-stick/41357 "2026-08-01T21:44:32Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![thingy02](https://avatars.discourse-cdn.com/v4/letter/t/3da27b/32.png) [@thingy02](https://discourse.shapr3d.com/u/thingy02)\
**Post date:** [August 1, 2026, 9:44pm UTC](https://discourse.shapr3d.com/t/help-with-desk-organizer-tutorial-cant-get-lines-to-stick/41357/1 "2026-08-01T21:44:32Z")

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I’m following the Tutorial on how to build the Desk Organizer, but I am stuck at the part where I need to subtract the shape. I can’t easily describe it in words, so here are some pictures

Instead of selecting tjust the part I want to cut out, it selects the whole side. How do I fix this?

 ![image](https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/3X/0/1/014c841afb1b833db9f2a4654db117397a069166.jpeg)

 ![image](https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/3X/b/b/bb449394e6f7c735f8ae14e1106e527b659861b8.jpeg)

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**Author:** ![shaprvision](https://avatars.discourse-cdn.com/v4/letter/s/4491bb/32.png) [@shaprvision](https://discourse.shapr3d.com/u/shaprvision)\
**Post date:** [August 2, 2026, 3:37am UTC](https://discourse.shapr3d.com/t/help-with-desk-organizer-tutorial-cant-get-lines-to-stick/41357/2 "2026-08-02T03:37:35Z")

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Looks like you are missing 2 lines to close the shape. Draw lines from the upper right corner to the endpoints of the other 2 lines. Then when you select, it will select the area defined by the closed sketch just like the tutorial.

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**Author:** ![margriet](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/margriet/32/36415_2.png) [@margriet](https://discourse.shapr3d.com/u/margriet)\
**Post date:** [August 2, 2026, 5:23pm UTC](https://discourse.shapr3d.com/t/help-with-desk-organizer-tutorial-cant-get-lines-to-stick/41357/3 "2026-08-02T17:23:31Z")

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I think you have to go to your sketch you used for extruding the box. Select that one and then draw the other lines.

I have made that also, perhaps my file can help you.

[Desktop organizer.shapr](https://discourse.shapr3d.com/uploads/short-url/lWTAnnwC9KyzMMCTBtgxBE9intT.shapr) (169.0 KB)