is it possible to create a vertically aligned toolbar with some custom tools (for example measure tools) and remove them from the standard viewer toolbar?
TIA Alder
Yes, you can create another toolbar instance and make it vertical:
const toolbar = new Autodesk.Viewing.UI.ToolBar('myCustomToolbar', { alignVertically: true });
viewer.container.appendChild(toolbar.container);
See this gist for more details.
And you can also remove buttons from the standard toolbar using the Viewer API, for example:
viewer.toolbar.getControl('modelTools').removeControl('toolbar-sectionTool');
Of course, you have to know the IDs of the controls you want to remove. You can find those by inspecting the toolbar during runtime with commands like viewer.toolbar._controls
or viewer.toolbar.getControl('foo')._controls
.