First you have to install emmet. So you will go to your browser and search on google emmet download or click on this link https://emmet.io/download/
Then click on adobe Dreamweaver. Then go to the github.com page. You just scroll down and see the section where README.md section is showing.
Here you will show the section just click in emmet.zxp for download the emmet and if you have no Adobe Extension Manager then click in here link. When these two file are complied the download then first click on Adobe Extension Manager. If install is complied drag the file emmet.zxp to the Adobe Extension Manager. It will automatically install to your Dreamweaver. See install emmet in Dreamweaver is very easy.
When every thing will fine open Dreamweaver and type some code with there first letter just like d for <div> and click CTRL + E , it’s work.
If you want the PDF of emmet keyboard shortcode click on download