All elements which are created using this menu option determine the shape and appearance of the symbol.
Switch off the grid function when creating small elements (function key <F5>). However, bear in mind that the connection points (pins) must always be located inside the snap grid. The grid size of 0.1 inch or 2.50 mm is a good value and most libraries are set to this grid size. You can then take advantage of the automatic sizing feature if you really have to work in another grid size.
The drawing possibilities largely correspond to those of freehand drawing.
UNDO and REDO memory are deleted with the selection ALL, by selecting the menu option Pins, Symbol name, Reference name and Change size and in the Library menu in the case of Delete+Load and Load component.
Note
Make sure that your connection pins are always drawn with the grid switched on (F5).