GANDALF application to generate modified versions of an initial spectrum by adjusting the stellar parameters within the latent space. The top panel displays the original spectrum along with its four stellar parameters. The middle panel shows the latent space representation. The bottom panel shows two spectra: a new spectrum generated by setting the stellar parameters to T_eff = 7500 K and [α/Fe] = 0.0 (spectrum 2) and the original spectrum reconstructed by the auto-encoder (spectrum 3), which is nearly identical to the initial input (spectrum 1). The figure is adapted from the GANDALF application.