URL Convert as User Friendly

https://codex.www.ads-software.com/Using_Permalinks#Choosing_your_permalink_structure

Hi Samuel , thanks for your fast response.
I’m using Apache 2.xx for Configure this wordPress Site. Can you help on part of Apache web server with the mod_rewrite module ?
how can I properly configure it.
I appreciated your Help.

Hi comdini,

In your Dashboard, did you go to Settings → Permalinks and choose your desired setting?

(It looks like you’ll want to use Custom Structure, using /%postname%/.)

Is there a way of doing this without loosing the original URL? If I use change the existing Permalinks then none of the external links to my site will work any more, so is there a way of having pretty links, which Google likes, without loosing traffic from external sites pointing at existing URLs? Or am I asking the imposable?