Update docs/tools/CLI/cli-setup/cli-reqs.md

Co-Authored-By: bridadan <[email protected]>

Author: iriark01

docs/tools/CLI/cli-setup/cli-reqs.md

@@ -229,7 +229,17 @@ Mbed CLI supports a setting for each toolchain path:
 | GCC Arm Embedded Compiler | `/usr/bin/arm-none-eabi-gcc` | `GCC_ARM_PATH` | `/usr/bin`|
 
 ##### Using Arm Compiler 6 from Mbed Studio
-Mbed Studio comes with a free version of Arm Compiler 6 when it's used with Mbed OS. It requires configuring the `ARMC6_PATH` as well as setting an environment variable to manage the license.
+Mbed Studio comes with a free version of Arm Compiler 6 for use with Mbed OS. If you want to use Arm Compiler 6 with Mbed CLI:
+
+1. Install [Mbed Studio](https://os.mbed.com/docs/mbed-studio/latest/introduction/index.html).
+1. Configure the `ARMC6_PATH`.
+
+    For Mbed Studio 0.4.0, the Arm Compiler 6 executable is located in `./tools/ac6/bin`. This path is relative to the installation directory of Mbed Studio. On Windows, for example, the default path is `C:\MbedStudio\tools\ac6\bin`.
+
+1. Set the environment variable `ARMLMD_LICENSE_FILE` to the path of Mbed Studio's Arm Compiler 6 license. For Mbed Studio 0.4.0, the license is located at `./tools/ac6-license.dat`. This path is relative to the installation directory of Mbed Studio. On Windows, for example, the default path is `C:\MbedStudio\tools\ac6-license.dat`. 
+
+    Note that this environment variable is not managed by Mbed CLI, so you must set it appropriately in your environment.
+
 
 For Mbed Studio version 0.4.0, the Arm Compiler 6 executable is located in `./tools/ac6/bin`. This path is relative to the installation directory of Mbed Studio. On Windows for example, the default path is `C:\MbedStudio\tools\ac6\bin`.