1) Drag and drop file on the opened model, then "use file by reference"
2) Control + right mouse button drag
3) No simple way (even area select above doesn't work). The only method I see is to use source window (view -> new source window)
2) Control + right mouse button drag
3) No simple way (even area select above doesn't work). The only method I see is to use source window (view -> new source window)