I started this blog http://www.MindBodySpiritJournal.com using the default permalinks, the blogname.com/?p=number style.
Now, I would like to change, from here forward, to blogname.com/custom-name-for-post.
If I make that change immediately in Options/Permalinks will that cause any problems with the earlier 150-some posts that are already named blogname/p=number?
What I'm concerned about is that I don't want the posts that have the default-style names to lose those -- since they're already Google indexed. I just want posts from here on out to take on the new style.
Will I accomplish that if I change the style in Options/Permalinks now?