Is it possible in QGIS to make a particular point of a custom .svg symbol coincide with the layer point position? i.e referring to the image: I would like to make the beginning of the symbol line coincide with the geographical position of the point in the layer (cross):
@Andrew-63, unfortunately, QGIS is not that superpowerful in the sense of visualization and symbolization.
However, in your case, I can suggest
Layer Properties > Style > SVG Marker > Anchor point
There is a possibility to edit the anchor point with custom expression, which will include [FIELD_x] and [FIELD_Y] accordingly.
Furthermore, you can play with
But be careful when working with metric dimensions, since the changes that you apply to the SVG marker offset in QGIS main window will differ from the visual part in Print Composer.
And as @J.R mentioned, it is better to work with map units.