Connect and disconnect strips for easy selection and transformation. (PR#124333)
Thumbnails for movie and image strips load faster, and are much less "flickering" (e.g. no longer reload on undo).
For dense timelines, the thumbnail repainting is also several times faster. For new files they are enabled
by default now. (PR#126405, PR#126972, PR#127403)
The preview area now supports snapping.
Source points include the four corners and origins of all selected, visible strips.
Snap targets can be the preview boundaries, the preview center, or the corners/origins of other strips.
(PR#122759)
Preview area default tool is Box Select now, and toolbars are shown by default. (PR#126336)
Color Balance modifier is several times faster (for regular images) or a bit faster (for float/HDR images). (PR#127121)
Saturation and Multiply strip color controls are several times faster (multi-threaded now). (PR#127409)
For images at the bottom channel that use Alpha Over blend mode, the actual "blend with transparent black" step can be skipped now.
This particularly helps float images, e.g. EXR image with RGBA channels at the bottom. (PR#127310)