(2023-07-03, 15:18)Martin Stockton Wrote: when I reload a design it shows a lot of the items with either a red or blue outline. When this happens I cannot insert any new items, they drag on but when I let go of the mouse button they disappear!
Like Gerald wrote, part snapping information is enabled (toggle it with F11).
And it seems the model is 'degraded' to part level for some reason.
LDCad's rendering engine differentiate between models and parts by assuming a model has only TYPE 0 and TYPE 1 lines.
If any type 2 or higher lines are found it will compress all the (recursive) data into a single 'part' to be rendered as a single entity, which has all kinds of performance benefits.
But it also means you can only add shadow information to it using the editor.
So dropping a part will actually add a SNAP_INCL which will be invisible most of the time when used with normal parts.
To fix this (assuming you did not embed parts in the mpd) open your model in e.g. notepad and search for lines starting with 2..5 and remove them.