May one adjust the height of a shtender on Shabbos?<a href="#_ftn1" name="_ftnref1">[1]</a>
Yes. This may be done even if it involves loosening and tightening screws, as it is not made to last even temporarily.<a href="#_ftn2" name="_ftnref2">[2]</a> However, some Poskim<a href="#_ftn3" name="_ftnref3">[3]</a> are stringent to forbid doing so being that at times one does leave the Shtender in the adjusted position temporarily for a few days.
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<a href="#_ftnref1" name="_ftn1">[1]</a> Piskeiy Teshuvos 9:38
<a href="#_ftnref2" name="_ftn2">[2]</a> So rules Az Nidbaru 14:11 and Sheivet Halevy 6:32; Shulchan Shlomo 313:7
<a href="#_ftnref3" name="_ftn3">[3]</a> Minchas Yitzchak 9:38

Shulchan Aruch HaRav | May one adjust the height of a shtender on Shabbos?

May one adjust the height of a shtender on Shabbos?[1] Yes. This may be done even if it involves loosening and tightening screws, as it is not made to last even temporarily.[2] However, some Poskim[3] are stringent to forbid doing so being that at times one does leave the Shtender