Firstly, I know these tips I am posting may be fundamental and basic to the geek fraternity, but a significant number of ordinary not-so-knowledgeable users are members of Forums. They are the target of my hopefully useful tips.
I would suggest that the taskbar is unlocked, just right click the taskbar clock and uncheck the "Lock the Taskbar"." If you place the cursor on the top taskbar line, you can customise the taskbar for depth and width by dragging when the vertical or horizontal arrows appear.
To get any desktop program onto the Quick Launch/Taskbar is easy, simply left click on the program icon, hold down the mouse key and drag the icon to the taskbar, release the mouse key. All done. The initial icon does not move and remains in place.
To delete an icon from the taskbar, right click, select "Delete" on the pop-up panel and it is gone.
For a program not on the desktop, right click the icon>Send to>desktop>Create icon. An icon then appears on the desktop and you proceed as above. Then just delete the temporary desktop icon.
When finished, lock the taskbar by rechecking the "Lock the Taskbar" as described above.