#RasterViz V 2.11.1 now lives inside QGIS's own Layout Designer — no more separate window.
RasterViz adds its own dock panel to the Layout Designer — select a colorbar item and its full set of matplotlib-style controls (colour ramp, min/max range, tick count/decimals/position, bar style, fonts, padding, corner rounding) shows up right there, synced automatically to whatever's selected. Change any setting and it pushes the update to both the main map canvas and the layout's printed map at the same time, so you're never stuck flipping to Item Properties or hitting "Refresh view" to see the result.
Full Changelog: https://github.com/Defani/RasterViz/commits/rastervizqgis