Changing the date range
Period start and Period end controls define the period that will be displayed in the Worklog grid (the columns of the Worklog grid).
The date range to be displayed can be set from a minimum of 1 day:
You can choose any date range that suits you, the grid will have a horizontal scrollbar once the screen width is exceeded by the grid size. The first 4 columns with issue data will stay locked so you can have a clear view of what you are editing even when scrolling the grid: