Select Layers, In/Out points, and keyframes at the same time
The ability to select multiple different "types" of objects in the layer panel is a must-have for efficient workflow. Being able to select an in-point, a keyframe, and an entire layer (or any combo of those) should be possible and would improve working speed a huge amount, especially when retiming an existing animation.
For example, often a group of keyframes, another layer's in-point, and an entire precomp will need to be set up in perfect sequence, which needs to be be retimed due to feedback. As it stands now, I would need to move keyframes, in-point, and precomp layer all separately, requiring (at least) 3x as many clicks, and also introduces the requisite off-by-one frame mistakes, etc. In a large comp, or with an extreme example, this can get incredibly confusing and frustrating as once you begin to move things, nothing lines up and is a jumbled mess. If I could select everything in the timeline at once this would become massively easier, simpler, and faster.