stuck in a selected option I'm new to blender and somehow I got into some mode or something (not sure what or how) but I can't find a way out of it. there is a constant orange dot in object mode (even if I press A to deselect everything) and if I change to edit mode a blue line around the object appears(pic) and nothing else except within that selection can't be adjusted or selected. how do I get out of this selection?

thanks
This orange dot is the origin of the object which will be visible in all modes (Object, edit and pose(armatures) modes), so it's not the vertex, as shown below:



If you press A to select all vertices then you will find the vertices highlighted as shown below:



You can select 1 vertex using RightClick then move it using G as shown below:



The edges are blue because they are marked. There are five types of markings you can apply to edges. The following is the basic colour scheme:


Red - UV seam
Pink - Edge crease
Blue - Sharp edge
Green - Freestyle edge
Orange - Bevel weight


To clear the mark edges yourself from Edit Mode, go to the Edge menu (Ctrl+E) then choose Clear Sharp as shown below:


Then edges will be orange again as normal as shown below: