Joint-deconvolution imaging strategy used in the ALMAGAL processing workflow. The target used as an example is the ALMAGAL field 101899 (also labelled AG023.0108–0.4102 in Molinari et al. 2025). The different columns show from left to right: CLEANed image, residual image, CLEANing mask, and histogram of residual emission. The different rows show the four main steps of the iterative CLEANing process (see details in Sect. 4.4). Note that in Step 1, there is no starting CLEANing mask and the output (shown in the panel) is generated from the multi-thresh automasking functionalities of tclean.