Temporal variation of the properties of one loop-like feature. This plot is for feature B as marked in Fig. 3. The properties of the other three features are shown in Figs. A.1 to A.3. These data are based on the ellipse fits of the features: a) the major axis representing the length; b) the minor axis the width; c) the angle of the major semi-axis with the E-W direction for the angle; and d) the intensity integrated over the ellipse for the structure brightness. The time is with respect to the first full-frame Hi-C image at 18:53:11 UT. See Sect. 3.1.