Well, with parts snapping and rotation along local part axes, it's nearly useless. Things useful to know:
- switch to part local axes: select part, then press 'o'. Switch back to world axes: press 'o' with nothing selected. Eg. to rotate arm/hand/accessory, select them all (with arm selected first), press 'o' then rotate everything. Similar to rotate hand+accessory.
- To use parts that don't have yet connectivity: use a similar part that already has connectivity defined, then select it and double click in parts bin on the right part to replace the place holder.
- switch to part local axes: select part, then press 'o'. Switch back to world axes: press 'o' with nothing selected. Eg. to rotate arm/hand/accessory, select them all (with arm selected first), press 'o' then rotate everything. Similar to rotate hand+accessory.
- To use parts that don't have yet connectivity: use a similar part that already has connectivity defined, then select it and double click in parts bin on the right part to replace the place holder.