User`s manual

Multiple logfiles and datasets
ModelSim Xilinx User’s Manual Multiple logfiles, datasets and virtuals 6-97
Once you have specified the logfile and dataset name, the dataset is ready for
viewing. To view the dataset, use the Main > View > Dataset menu selection to
open the Dataset Browser
Select Open to browse for a dataset (this opens the View Dataset dialog box as
well). Once the dataset is open, you can select it and choose Make Active to
prepare it for viewing. Add signals to the Wave window with add wave command
(CR-23).
Make Active makes the selected dataset the "active" or default dataset. Default
dataset means that if you type a region path as part of a command and omit the
dataset prefix, the default dataset will be assumed. It is equivalent to typing: env
<dataset>: at the VSIM prompt.