Footprints This category is specifically about footprints. It is nested inside of the "Layout" category, as it is closely tied to it. For all issues with the actual software (import errors, etc), please post under the "software" section.
Gerbers (GerbView) If you have issues generating or viewing your gerbers, you should post about it here. Also issues with file formates or understanding what gerbers should be used for.
3D Models This category is about the 3D modeling capabilities of KiCad, including the ability to import models of the components and export models of the entire PCB for external programs.

About the Layout category [Layout] (2)
CRASH when opening any footprint [Footprints] (6)
Something wrong with v5.00 and step files? [3D Models] (14)
How to assign JST footprint to connector [Footprints] (4)
V5 Settings Clearing on crash [Layout] (3)
Part disappears when flipped? [Layout] (2)
Pad with special shape in V5 [Footprints] (18)
Newbie help with designing a PCB with a 4PDT switch [Footprints] (3)
Beginner problems with drawing proto shield. (DRC setup, not able to connect pads, missing footprint error message) [Layout] (17)
2 important issue plz support PCBnew kicad 5.0 [3D Models] (19)
Net not in Copper Zone dialog list [Layout] (6)
Pcbnew/footprint editor: How do we use the Grid 1 / 2 "Fast Switching?" [Layout] (4)
Import model of entire PCB [3D Models] (5)
KiCad-StepUp: Missing footprints and paths [Footprints] (5)
Filled zone cuts corner of mask on square pads ( 2 3 ) [Layout] (51)
KiCad 5 footprint editor: what are the "Set grid origin" and "place footprint reference anchor" buttons for and how/when/why do we use them? [Footprints] (7)
[SOLVED] "Broken Ring" pattern in paste layer for footprint generation ( 2 ) [Footprints] (29)
Ground planes connected by many gridded vias? [Layout] (8)
Reannotate without messing the PCB [Footprints] (3)
Complex board outlines [Layout] (3)
How to create proper ground plane [Layout] (15)
Import/Create FootPrint DXF ( 2 3 4 5 ) [Footprints] (81)
How to do a combination footprint with dissimilar devices [Footprints] (3)
Problem using template projects, footprints duplicated after changing refdes [Layout] (5)
Power tracks on bottom of the board [Layout] (7)
Wide traces to to pads [Layout] (5)
Component values showing in silk [Layout] (10)
To SMA or not.. and 50ohm traces [Footprints] (9)
Kicad StepUp - VRML recommend Materials? [3D Models] (7)
How to view components in 3D viewer [3D Models] (14)