docs: add user guide for GNOME's screenshot application (#2325)

* docs: add user guide for GNOME's screenshot application

Signed-off-by: Christine <[email protected]>

* feat: add content

Signed-off-by: Christine <[email protected]>

* fix: revise decibels

Signed-off-by: Christine <[email protected]>

* fix: replace the word application with better terms

* fix: revising metadata again 😤

* Update decibels.md

* Update decibels.md

* Update docs/desktop/gnome/screenshot.md

fix: revise grammar error

* Update screenshot.md

---------

Signed-off-by: Christine <[email protected]>
Co-authored-by: sspencerwire <[email protected]>

Author: CBID2

docs/desktop/gnome/decibels.md

@@ -6,7 +6,7 @@ contributors: Steven Spencer, Ganna Zhyrnova
 
 ## Introduction
 
-Decibels is an app that plays audio files. Its user-friendly interface makes uploading and playing your favorite song(s) and recordings of lectures, project ideas, and other files easy.
+Decibels is an application that plays audio files. Its user-friendly interface makes uploading and playing your favorite song(s), recordings of lectures, project ideas, and other audio files, easy.
 
 ## Assumptions
 
@@ -22,17 +22,31 @@ Go to [Flathub.org](https://flathub.org), type "Decibels" in the search bar, and
 
 ![Screenshot of the Decibels app page on FlatHub, showing the install button being highlighted by a red rectangle](images/01_decibels.png)
 
-Then, run the following command in your terminal:
+![manual install script and run script](images/decibels-install.png)
+
+2. Copy the manual install script and run it in a terminal:
+
+    ```bash
+    flatpak install flathub org.gnome.Decibels
+    ```
+
+3. Finally, copy the run command and run that in your terminal:
+
+    ```bash
+    flatpak run org.gnome.Decibels
+    ```
 
-`flatpak run.org.gnome.Decibels`
 
 ## How to use
 
-To use the app, do the following steps:
+To use Decibels, do the following steps:
+
+1. Click on **Open**
 
-1. Click on *Open*
     ![Screenshot of Decibels' landing page with a red rectangle surrounding the blue open button](images/02_decibels.png)
-1. Pick your desired file and click on the **Open** that appears in the upper right corner of the screen
+
+2. Pick your desired file and click on the **Open** that appears in the upper right corner of the screen
+
     ![Screenshot of Decibels file selection interface with numbered arrows indicating audio file and Open button](images/03_decibels.png)
 
 

docs/desktop/gnome/images/decibels-install.png

@@ -0,0 +1,40 @@
+---
+title: Screenshot 
+author: Christine Belzie
+contributors:  
+---
+## Introduction
+
+Tired of using your keyboard to take images on your computer screen? Meet Screenshot! It is an application that helps you quickly take onscreen images.
+
+## Assumptions
+
+This guide assumes you have the following:
+
+- Rocky Linux
+
+!!! note
+
+    According [to GNOME's website](https://apps.gnome.org/), this application is pre-installed on your desktop. 
+
+## How to Use
+
+To use Screenshot,  do the following:
+
+![Screenshot of image being taken by the application with the options present](images/screenshot-01.png)
+
+1. Pick the onscreen image you want to screenshot, go to the application, choose the method that you want to use to take your picture.
+
+2. Click **Take a Screenshot**
+
+    ![Screenshot of taken picture of being saved with black arrows pointing at a textbox that contains the file name, "Linux.png" as well as Save and Copy buttons](images/screenshot-02.png)
+
+3. Once you're satisfied with the screenshot, rename the file, and click on **Save**.
+
+   !!! tip
+
+    Want to save your computer's storage? Click on **Copy** to quickly add your screenshot to your work. 
+
+## Conclusion
+
+Whether it is a picture for your online collage, computer's background, or a tutorial that you are creating for your favorite product, GNOME's Screenshot is the tool help you get the screenshots you want. Eager to learn more about or have more ideas for this application? [Submit an issue to Screenshot’s repository at GitLab](https://gitlab.gnome.org/gnumdk/screenshot/-/issues).