Can't edit certain blocks in Exim Advanced Editor

Running cPanel 76.0.0 on CentOS 6.10 kvm. I'm in Exim Configuration Manager > Advanced tab. Am trying to edit the three "delay = #s" values to reduce the # of seconds. The relevant sections of Advanced editor are pasted below. The problem is even though these look like they should be editable fields, they can't be changed. Tried Firefox. Then tried Chrome with no add-ins enabled. Still can't edit the fields. Am I missing something that should be obvious? On an earlier date we changed these settings direct in exim.conf without realizing the new values would be overwritten by cPanel later. My understanding is the standard way to ensure our exim changes "stick" is to make the changes in the Exim Config Advanced tab. Any idea what I'm doing wrong? Thanks for any advice you can offer. In "acl_smtp_connect" section: warn !hosts = : +loopback : +neighbor_netblocks : +trustedmailhosts : +recent_authed_mail_ips : +back upmx_hosts : +skipsmtpcheck_hosts : +senderverifybypass_hosts : +greylist_trusted_netblocks : +greyl ist_common_mail_providers : +cpanel_mail_netblocks #only rate limit port 25 condition = ${if eq {$received_port}{25}{yes}{no}} delay = 20s In "acl_smtp_rcpt" section: warn !authenticated = * !hosts = : +loopback : +neighbor_netblocks : +trustedmailhosts : +recent_authed_mail_ips : +back upmx_hosts : +skipsmtpcheck_hosts : +senderverifybypass_hosts : +greylist_trusted_netblocks : +greyl ist_common_mail_providers : +cpanel_mail_netblocks #only rate limit port 25 condition = ${if eq {$received_port}{25}{yes}{no}} delay = 20s warn #acl_m2 is spam = YES condition = ${if eq {${acl_m2}}{1}{1}{0}} !hosts = : +loopback : +neighbor_netblocks : +trustedmailhosts : +recent_authed_mail_ips : +back upmx_hosts : +skipsmtpcheck_hosts : +senderverifybypass_hosts : +greylist_trusted_netblocks : +greyl ist_common_mail_providers : +cpanel_mail_netblocks delay = 40s