animation - Grease Pencil Keyframes not visible in timeline - Blender Stack Exchange

I am very new to blender, working on my first project. I am trying to combine a 3D model, animated using an armature, with some hand-drawn animation, using grease pencil. I started with the model

blender 3D Model Texture Animation Suite – gfkDSGN

grease pencil - Help with marking keyframes for the timeline - Blender Stack Exchange

Problem with Grease Pencil Keyframes for Colors - Materials and Textures - Blender Artists Community

Why Can't I See My Keyframes in Blender's Timeline? (Tutorial)

2d - Blender Grease Pencil - key frame animation is continuous instead of frame by frame - Blender Stack Exchange

animation - Grease Pencil Keyframes not visible in timeline

Maya User's Guide: Edit Mesh > Detach Component

Creative Coding in Blender 2.92: A Primer, by Jeremy Behreandt

Blender Software: Most Up-to-Date Encyclopedia, News & Reviews

The Complete Guide to Blender Graphics: Computer Modeling & Animation, Fifth Edition [5 ed.] 0367184745

I want to know if I have created a perfect looping animation using Blender? - Quora

The Making of User Lib – Urchin

pressing i wont insert a keyframe - CG Cookie

grease pencil - Keyframes disappearing - Blender Stack Exchange