How to Set Environment Variables in Kettle

To set Environment Variables go to Edit menu and click Set Environment Variables or press CTRL+ALT+J, in the name column name your variable and assigned it to any value by default the variable is of String type. You can later in your job or transformation access these variable using GET VARIABLE STEP but it is recommended not to use Environment Variables if your working in multiple or more than two Transformations  or jobs as these variable have global scope and  Changes to the environment variables would conflict in Transformations or jobs for this reason Kettle variables were introduced to provide a way to define variables that are local to the job in which the variable is set. The Set Variable step in a transformation allows you to specify in which job you want to set the variable's scope (i.e. parent job, grandparent job or the root job).

 

in the same tab of Edit menu you can see your all Environment Variables using Show Environment Variables option, here you can also up and down your Variable on clicking name column header.