If you add Touch Keyboard to your taskbar (see the following screen shot), you can instantly open it in your PC when needed. And this text particularly tells you two ways to add Touch Keyboard to taskbar on Windows 10 computer.
Method 1: Add Touch Keyboard to taskbar via the taskbar context menu.
Right-click the blank area on the taskbar, point at Toolbars on the context menu and select Touch Keyboard.
Method 2: Add the keyboard to taskbar in Taskbar and Start Menu Properties.
Step 1: Open the Taskbar and Start Menu Properties window.
Right-tap any blank space on the taskbar and choose Properties.
Step 2: Make changes to Toolbars settings.
Open Toolbars, check the box before Touch Keyboard and tap OK.
Tip: Supposing that these two methods are unavailable in your Windows 10 PC, you can try the following way.
Right-click blank area on the taskbar, and then select Show touch keyboard button, as shown in the picture below.
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