What is the best way to align a set of points to the center so when I add a mirror modifier there is no seam at the center?

Thanks.

mo·nop·o·ly  [muh-nop-uh-lee]
noun, plural mo·nop·o·lies.
1. exclusive control of a commodity or service in a particular market,
or a control that makes possible the manipulation of prices

if i get you right you want to know how to keep the 2 halfs from seperating at the center in mirror modifier

thats easy enable clipping

if you start with it enabled the central axis will (if the mesh is centered) will always remain at the objects center while in object mode  switching to edit mode you can move it but you will not effect the set center

 

There's a number of ways... but the easiest is to select the points (vertices) - in Edit mode, vertex mode - you want to centre, then hit [N] and [NUMPAD][1] whilst the mouse cursor is in the 3D view window. Scroll to the top of that menu of stuff to 'transform', and for X: axis enter 0 (zero) and enter.

Monterey/Mint21.x/Win10 - Blender3.x - PP11.3(cm) - Musescore3.6.2

Wir sind gewohnt, daß die Menschen verhöhnen was sie nicht verstehen
[it is clear that humans have contempt for that which they do not understand] 

Metaphor of Chooks

Far better solution, unbroken-f...

Monterey/Mint21.x/Win10 - Blender3.x - PP11.3(cm) - Musescore3.6.2

Wir sind gewohnt, daß die Menschen verhöhnen was sie nicht verstehen
[it is clear that humans have contempt for that which they do not understand] 

Metaphor of Chooks

better explanation

CTRL+TAB edit mode

enable mirror and clipping

then start working

you can enable or disable at ant time

applt modifier before export

but you do need to set the axis right at first or it will be way off

 

Hey. I just wanted to pop by and thank everyone for their tips.

IRL is being a little challenging. I haven't actually had a chance to sit down and practice what you've preached, but I didn't want to leave you thinking your contribution went unnoticed or unappreciated.

Soon as I have some time to sit down and practice, I'll come back with an update. ;-)

mo·nop·o·ly  [muh-nop-uh-lee]
noun, plural mo·nop·o·lies.
1. exclusive control of a commodity or service in a particular market,
or a control that makes possible the manipulation of prices

No worries, Joe.

Real Life always comes first... even for us BlenderHeads... :lol:

Monterey/Mint21.x/Win10 - Blender3.x - PP11.3(cm) - Musescore3.6.2

Wir sind gewohnt, daß die Menschen verhöhnen was sie nicht verstehen
[it is clear that humans have contempt for that which they do not understand] 

Metaphor of Chooks