Admin List Limit - Expand Admin Autocomplete Limit PRO
Per default, all autocomplete fields (e.g. products, categories, options, etc.) will have a limit 5 entries - hardcoded.
With this easy to handle extension, you will have now full control how many entries shall be displayed.
Installed as module, you can:
1. enable/disable the module
2. set the limit
3. define the height of the displayed field
If you do not need control over the settings and have enough with fix 20 entries, use the free module: Free Version