You may notice that your weaving designs are saved with the file name that you assign with extensions of both "wif" and "twa".
If you have the extensions hidden in File Explorer on your computer, you'll see the file name twice. In file explorer, under View, there is an option to hide or display file extensions.
When you open a design in TempoWeave, it doesn't matter which extension you select to open. The only time you need to consider the extension is if you are sharing a weaving design with someone who does not have TempoWeave; in that situation be sure to share the extension of "wif".
The Weaving Information File standard was established in 1996 as a way to store the instructions to create a weaving draft in a text format. Tempoweave, as do many other weaving design programs, also use a proprietary extension so that more information can be stored about the weaving design. Most all weaving design software programs, including TempoWeave, are also capable of production designs with the "wif" extension so that they can be opened with any weaving design software. The only difference in TempoWeave is that we always save the WIF as well as the TWA file.
A couple of examples of information stored in the TWA file that are not also in the WIF are the data to support marking sections and section assembly and color names.