How can I use the mouse wheel to move back in time on my TWS charts?

From the chart window click File followed by Add Chart to Window. In the dialogue box which populates uncheck the box next to the line which reads, "Sub chart uses current security," if you wish to use a different contract. 

Find out more in the TWS Users' Guide…

Highlight the ticker with a left click of the mouse and then click the delete key on your keyboard to remove a symbol…

No, currently you cannot export data from a chart. If you would like to save a copy of the chart you are currently viewing, you may do so by clicking the File menu option followed by Save and Chart Image...

Find out more about TWS charts in the …

To add or remove news from a TWS chart, click on the Edit menu followed by Chart Parameters. In the Chart Parameters window, check or uncheck the box next to "News" within the "Highlight on chart" area. Click Apply and OK to save your changes.

Find out more about configuring charts in the …