Basic Data Administration for layers is accessed in the Basic Data Administration navigator entry, see figure 1 below.
Figure 1. Basic Data Administration in the navigator
The Use For Development flag is used to set the default layer in Export Language Files and Scan Translatable Code windows. Only one layer can be checked in the Use For Development column. See figure 2-4.
Figure 2. Basic Data Administration - Layer
Figure 3. Scan Translatable Code window with Core as default selected layer
Figure 4. Export Language Files window with Core as default selected layer