Point and click should be available for all the enhancements to the screen
I am hearing/visually impaired as well as color blind. I find the keyboard commands to access the screen's assistive features too difficult to use. If there was a user tool bar to pull down the features you wish to use using a point-and-click with one's mouse that would be faster and less prone to keyboard errors and searching for keys that are unfamiliar to a sight-impaired user. I cannot use the hearing/listening features very well if at all. The mix of tones is not effective for my level of hearing--moderate to profound loss of tones.
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