Simulated observations using HST WFC3 (the top three panels, for F105W, F125W, and F160W) and JWST NIRCam (the remaining panels for F115W, F150W, F200W, F277W, F356W, and F444W). In each subfigure, we show the same source at z = 6.145 lensed by MACS J0416.1-2403. Each panel uses its own flux range to optimize visibility of the source structure. The typical background level and exposure time for each filter are listed in Tables 1 and 2. Further details are reported in the text. The black squares in the bottom right corner of every subfigure show how the source galaxy appears when the gravitational lensing effect is not included. The unlensed and lensed sources are represented using the same pixel scale. A blue circle highlights the same clump in both the lensed and unlensed images, showing its corresponding position in the lens and source planes.