I wonder if it is possible to have a search drop down list and check boxes.

So for example, press the search on species - drop down list shows with list of choices and the option to select as many options as you want from the list. So if you want to look for two species or more at the same time you can.

Press search by colour - drop down list shows allowing you to choose the colours you wish to search for.

Etc

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The inventory sub folders idea would be nice for both items and pixpets, but I believe the storage might have been something that was added to allow for sorting already?