Windows 7 64bit
NVIDIA GeForce GTX 760
Short description of error
There are several issues with the Grease Pencil in the recent blender 2.73. None of this is considered a bug.
Exact steps for others to reproduce the error
Based on a (as simple as possible) attached .blend file with minimum amount of steps
The Grease Pencil block uses to much space. In the Properties panel (N) the list with grease pencil strokes
takes to much space. Especially if it is empty.
In the same space as issue 1, there are the "list item up and down" buttons that appear when the on item was
created. They are only needed when the list contains more than one item. This is a Blender wide issue. This
buttons are even sometimes grayed out (Shape Keys).
In the Image Editor Grease Pencil can be activated when there is no image selected. In the VSE and the Movie Clip
Editor this is only possible, if there is a stripe or a movie clip loaded.
The user can "draw" a GP line in the VSE, when there is no stripe active, but this stripe is there and will be visible, when a
stripe is added. The user can draw in the Luma Waveform, Chroma Vectorscope and Histogram too. Those strokes
are only visible when Image Preview is selected.
In the Node Editor the tab for Grease Pencil is at first position. That tool is used here rarley, so this should be
consistent with the other Editor Windows and located at the last position of the tab list.
In the Properties panel (N) there is sometimes a second tab called "Grease Pencil Settings". It can be found in
the VSE and the Node Editor, but not in the 3D View, the MCE and the Image Editor. In the VSE it makes no
sence, because the VSE lacks the Tool Shelf (T), and in the Node Editor the purpose of the Grease Pencil is
only to annotate.
Editing. Wouldn't it be an option to go to the GP edit mode through the tab key? The user can leave the GP
edit mode via the tab key, but not enter it.
The user can draw the GP line strokes in different windows: 3D View, Image Editor, VSE, MCE and Node Editor.
The user can draw the strokes i.e. in Node Editor, but although open the Data-Block in a separate editor window,
sometimes not seeing anything, like between Node Editor -> 3D View. The other way around it works
(3D-View -> Node Editor).