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Both the selected grid plot and the selected aggregation time step are stored in the user settings when closing. When reopening FEWS the same aggregation time step will be selected. When an aggregation time step has been selected and the user switches between different plots, FEWS will attempt to select the same time step again for the new plot.
Since the 2023.02 the accumulation slider automatically contains an extra tick at the end of the slider do accumulate the time steps to/from the display time
Last Value Checkbox
When selected this checkbox shows the last available of time series configured in the grid plot. This can be useful when multiple timeseries with a different or non equidistant time step are defined within one grid plot and a time is selected where one time series does not have a time step. The time series can be scalar or grid. For scalars the last time step (that is still within the visible period) that does not have a missing value is shown, but for grids just the last time step is shown even though it can be a missing value. The checkbox will only appear when no accumulation or moving average slider has been configured, and can be hidden via configuration. The next screenshots show how data with a daily time step will appear at 22:00 even though it is not defined for that time:
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