If you are looking for signature like above, follow these steps:
1. Findout where is your company singnature, locate it, right click on it > Properties and note down its path as shown here.
Here the path is: c:\users\rohit\desktop\logos
and image name is: sign.png
2. a. Go to Settings > Template Settings > Disable company Signature
b. In Autorized Signature column, type as following:
For the company
Kindly note, this img src, you need to type as it is and the path will be your computer path where your signature file is located.
Also make sure your image size is 150x150 and is in JPG or PNG format.
That's it. Save these settings and now view invoice.