- Question: [Thursday, 19th Nissan, 5781]
May I make a mark on the page of a book on Shabbos in order to remember the page for editorial or other type of purposes? Is this considered like writing? Is this considered like preparing for after Shabbos?
It is forbidden to make an indentation on a page on Shabbos, such as through the use of one’s fingernail. However, it is permitted to fold the tip of the page of a Torah Sefer for the sake of remembering the page after Shabbos to either make note of its content or for editorial purposes.
Explanation: Although on Shabbos it is forbidden to make an indentation on the page of a book due to the Rabbinical writing prohibition, nonetheless the Poskim write that it is permitted to bend the page being that there is no intent to make an indentation. Nonetheless, this is only allowed for a mitzvah purpose, such as to remember a Torah subject, as otherwise it is forbidden to prepare on Shabbos for a weekday.
Sources: See Admur 340:7; Sheivet Hakehasy 1:130; Kinyan Torah 2:115; Piskeiy Teshuvos 340:19