Here is a simple script that you can use to navigate a document from segment to segment using Alt+Left and Alt+Right.
// Move to next segment!right::Send, {ctrl down}{pgdn}{ctrl up} Send, {down} Send, {ctrl down}{pgup}{ctrl up}Return
// Move to previous segment!left:: Send, {ctrl down}{pgup}{ctrl up} Send, {up} Send, {ctrl down}{pgup}{ctrl up}Return
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