I have created a timeline view for a work management project and I want to see timeline for issues i have in 2018 but the last i cn see is upto aug 22

So how can I move this upto year 2018?
Another question is regarding dependency, if we link two subtasks and if I choose to move one task then is it possible to that the linked issues also changes there timeline automatically, like if I move one subtasks then the connected one should move ahead as well, how can I achieve that?