Postman installation and test
1. Download the installation package first, after decompression can be installed according to the steps,

2. After the success of the installation, copy a url, click on the send test was successful,
Environment variable changes
1. Click in the top right corner of the small gear, add environment variable,
2. Click add to add,
3. Place in the circle below the red box to add
4. I add effect
5. Add is completed, click the add, add after the success can be found on the top right-hand corner below the red box position, to search again don't have to enter a {} in the input string url for middle VARLABLE value (that is, their input when adding environment variable name) with/file name again after test,