https://www.technipages.com/reset-chromebook
Press “Refresh”
and “Power” 
simultaneously to force a restart.
Simply press and hold the “Power” button until the Chromebook shuts off. You can then turn it back on.
https://www.chromestory.com/2014/03/add-multiple-accounts-chromebook-switch-without-logging/ button until the Chromebook shuts off. You can then turn it back on.
Switching profiles is as easy as clicking on the profile picture in the system tray popup. But there is a keyboard shortcut as well. <Ctrl> + <Alt> + <Period> and <Ctrl> + <Alt> + <Comma> keyboard shortcuts.
https://www.computerhope.com/jargon/i/insertke.htm#chromebook
On Google Chromebooks, you can simulate an Insert key or enter overwrite mode by pressing the Search key and the period key at the same time.
How do I use function keysOn Google Chromebooks, you can simulate an Insert key or enter overwrite mode by pressing the Search key and the period key at the same time.
Now, press the Search key - note the number row keys map to F1-F12
Chromebook-Specific Shortcuts
https://www.computerhope.com/shortcut/chromebook.htm
Ctrl+Shift+V Past text as plain text
| Ctrl+Shift+L | Lock your computer's screen. |
| Alt+1 through Alt+8 | Activates apps 1-8 on your shelf. |
| Alt+Shift+M | Open the files app. |
| Alt+Shift+S | Open the status menu. |
| Ctrl+Alt+Z | Toggle ChromeVox on or off. |
| Ctrl+Shift and + or - | Change the screen resolution. |
| Ctrl+Shift and 0 | Set the screen resolution back to default. |
| Ctrl+Shift and Reload | Rotate the screen 90 degrees. |
| F1-F12 | Search + 1 to Search + = |
| Page up | Alt or Search and up arrow. |
| Page down | Alt or Search and down arrow. |
Ctrl+ or Ctrl+F5 | Take a screenshot of the current page. |
| Ctrl+Shift+ or Ctrl+Shift+F5 | Take a partial screenshot of the current page. |
| Ctrl+Shift+Right Arrow | Select the next word. |
| Ctrl+Shift+Left Arrow | Select the previous word. |
| Shift+Search + Right Arrow | Select text until the end of the line. |
| Shift+Search + Left Arrow | Select text until the end of the previous line. |
| Ctrl+Backspace | Delete the previous word. |
| Alt+Backspace | Forward delete. |
| Ctrl+Right Arrow | Move cursor one word to the right. |
| Ctrl+Left Arrow | Move cursor one word to the left. |
| Ctrl+Alt+Up Arrow | Go to the top of the page. |
| Ctrl+Alt+Down Arrow | Go to the bottom of the page. |
| Ctrl+Search + Right Arrow | Go to the end of a document. |
| Ctrl+Search + Left Arrow | Go to the beginning of a document. |
ChromeVox is a screen reader created by Google that allows users to browse the Internet with the aid of synthesized speech played through their speakers or headphones
https://www.howtogeek.com/189324/master-chrome-os-with-these-chromebook-keyboard-shortcuts/
Press Ctrl + Alt + ? (or Ctrl + Alt + / ) to open a keyboard shortcut cheat sheet at any time.
Ctrl + Shift + L – Lock your Chromebook’s screen.
Ctrl + Shift + Q – Log out of your Chromebook. Press the key combination twice to quit.
Alt + E – Open the Chrome browser’s menu. This only works if a Chrome browser window is open and focused.
Alt + 1-8 – Launch applications located on Chrome OS’s “shelf,” or taskbar. For example, Alt + 1 will launch the first application shortcut from the left.
Alt + [ – Dock a window to the left side of your screen.
Alt + ] – Dock a window to the right side of your screen.
Ctrl + Switcher/F5 – Take a screenshot and save it to your Downloads folder The Switcher key is located in place of the F5 key on a standard keyboard.
Ctrl + Shift + Switcher/F5 – Take a screenshot of part of the screen. Use the cursor to select the part of the screen you want to save.
Alt + Search – Toggle Caps Lock. The Search key has a magnifying glass on it and is in place of the Caps Lock key on typical keyboards.
Shift + Esc – Launch the Task Manager.
https://support.google.com/chromebook/answer/1059492
- Optional: To add another keyboard language, select Language
Add languages. Choose your language(s) and select Add.
- In the "Languages and input" section, select Input method
- Check the boxes next to the keyboard languages you'd like to use.
- Select Back
.
- Select the keyboard language you want to use. You’ll see "Enabled" listed under the current keyboard.
- Optional: To see all your keyboard language options on your desktop, turn on Show input options in the shelf.
Note: You can also switch your language by pressing Ctrl + Shift + Space until you see the language you want. To switch back, press Ctrl + Space.
https://www.digitaltrends.com/computing/how-to-zip-and-unzip-files-on-a-chromebook/
If all you need to do is look at a few files, this is probably enough. But if you want to extract files from your archive, open a new file manager window, browse to or create a folder for the files, then drag everything from one window to the other.
https://chrome.google.com/webstore/detail/archive-extractor/nknadlalodfadgegkigkmbhofcmkhfnc
