أَمَّا بَعْدُ
To proceed.
In a speech, inspect how the introduction connects to the principal topic. A transition that develops an organic verbal or semantic bridge can count as fine takhalluṣ; a marked shift without such a bridge may be classed under iqtiḍāb.
A conventional marker such as “ammā baʿd” can be appropriate, but its presence alone does not establish intricate rhetorical transition. Clarity can be preferable to strained linkage.