# Customizing create topic form to add more custom fields, what does add\_to\_serializer or register\_custom\_field\_type do?

**URL:** <https://meta.discourse.org/t/customizing-create-topic-form-to-add-more-custom-fields-what-does-add-to-serializer-or-register-custom-field-type-do/57774>\
**Category:** Extras\
**Created:** [22.Февраль.2017 10:24:50 UTC](https://meta.discourse.org/t/customizing-create-topic-form-to-add-more-custom-fields-what-does-add-to-serializer-or-register-custom-field-type-do/57774 "2017-02-22T10:24:50Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![codinghorror](https://sea3.discourse-cdn.com/meta/user_avatar/meta.discourse.org/codinghorror/32/110067_2.png) [@codinghorror](https://meta.discourse.org/u/codinghorror)\
**Post date:** [23.Февраль.2017 01:13:38 UTC](https://meta.discourse.org/t/customizing-create-topic-form-to-add-more-custom-fields-what-does-add-to-serializer-or-register-custom-field-type-do/57774/2 "2017-02-23T01:13:38Z")

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This is going to have bad effects on mobile, though if you are removing category and replacing it with another field, there should be room in the UI at least.

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_[View the full topic](https://meta.discourse.org/t/customizing-create-topic-form-to-add-more-custom-fields-what-does-add-to-serializer-or-register-custom-field-type-do/57774)._