Current default tool is "sample" which is a bit odd, and coupled with the fact that the toolbar is hidden by default, this can be confusing to new users, leading them to believe tweak/select tools are not supported for the VSE preview. This change: - Sets "box select" as the default tool for the Preview - Makes both Preview and Timeline toolbars shown by default Pull Request: https://projects.blender.org/blender/blender/pulls/126336